Saturday, March 31, 2012

Selecting the Right Speakers Surround

When it comes to your surround sound or home theater system, the quality of your speakers can really make or break the overall experience. Good quality speakers are one of, if not, the most important components when it comes to your home theater and surround sound system. 

Surround Sound Setup

If you are in the market for a brand new surround sound system I'm pretty sure you've been a little baffled by all the options, bells, whistles, gadgets, gizmos, and price tags on the market today. Trust me, you are not alone. One of the most baffling things to many potential surround sound system consumers is where on earth should you put all the speakers. I intend to answer that question and a few more over the course of the next few paragraphs and hope that you will read along.

Pieces Parts Components and Sound

If you are in the market for a surround sound system I'm sure you are trying to learn as much as possible about options before you reach the buying stage. One thing to keep in mind is that there are many options and most of them will come down to a matter of taste when all is said and done. There is no right or wrong component or process when it comes to buying a surround sound system only what does and doesn't work for you and the space you have available.

Excellent Example of Electronic Evolution

No one had a clue during the early days of television the incredible impact that this device would have over people and their daily lives nearly a century later. I can hardly believe the difference between the television offerings of my childhood and the vast number of quality shows, channels, and information that is available by simply turning on the television.

Demystifying Surround Sound Terminology

Just in case you've been reading around and researching the many terms and topics that concern surround sound and the many surround sound systems on the market today, I thought it might be a good idea to explain some of the terminology that is floating around.

Bringing Theater Quality Sound Home

If you are one of the many people around the world who loves the sound quality of watching movies in theaters but hates the hassles (crying babies, people talking, cell phones ringing, etc) of actually going then I hope you are seriously contemplating the value that a home theater or surround sound system could bring to your movie enjoyment. 

Complete your home theater setup with home theater seating

After a full day of work and mind bubbling activities in the workplace, the last entry in a young professional’s diary is to go to a movie theater to relax. The sight and sound of a movie theater relaxes and easily entertains even the most stressed moviegoer. The problem with this however is the fact that even before you reach the movie theater, traffic jam may be a hindrance to your enjoyment. Traffic jam usually makes you more stressed than you currently are. It may be best if you can bring home the relaxation and entertainment. Having to sit and relax with your spouse in your own home theater maybe best to eradicate the tiredness that you feel.

Learn all you need from home theater reviews

If you are contemplating on acquiring a home theater system because you want to enjoy watching movies but hate tiding traffic jams to go to a movie theater, you may find it useful to read home theater reviews. Home theater reviews will help you understand the benefit of owning a home theater. It will help you acquire the most suited home theater setup that will give you the best experience you long for. Being able to watch movies after movies with no limit may be an enjoyment you want after a long day of work. Thus, owning a home theater is best for your, find the benefits that people who own home theater systems enjoy in a home theater review.

Friday, March 30, 2012

Line Follower Robot with AVR ATMega8535

Line Follower Robot with AVR ATMega8535 - Make the robot line follower is exciting, especially for those who like to friends experimented with AVR microcontroller ATMega. "Line Follower Robot" is a robot designed to follow the trail (can be a line putus2 line or even a point to point). Creating a Line Follower Robot uses an AVR microcontroller ATMega 8535 is very possible and very reliable. Due to the design of a Line Follower Robot should we think that the trail will be followed step by step Line Follower Robot will be made to track or path in Line Follower Robot is passed. And of the Line Follower Robot needs tersbut feature2 owned by AVR microcontroller ATMega 8535 is sufficient and meets the needs of the Line Follower Robot. Line Follower Robot in the article with AVR ATMega8535 I made a simple graffiti to be possessed by a Line Follower Robot.

Creating a Line Follower Robot with AVR

The article "Creating a Line Follower Robot with AVR [Censorship]" is a continuation of Line Follower Robot article with a new AVR ATMega8535 samapai phase Line Follower Robot block diagram. In the article "Creating a Line Follower Robot with AVR Part 1 [Sensor]" This is a review of the sensor used on Line Follower Robot, and the components used. Sensors, can be analogous to the 'eye' of a robot that serves to 'read' the black line of the track robot or vice versa. So that the robot is able to know when he will turn right, when he turned left and when he stopped. Sensors used are usually photo reflector, LDR (Light Dependent Resistor), Photo Diodes and Photo Transistor - mounted on the front two or more below the line follower robot.There also are using the camera as a sensor (or image sensor) to a higher-resolution readout line, making more accurate robot motion.

Line Follower Robot Sensor circuit with AVR ATMega

Robot Sensor circuit with AVR ATMega
Robot Sensor circuit with AVR ATMega  Circuit

The working principle of the sensor is simple, when the transmitter (infrared) emitting light onto a white field, the light will be reflected back to the receiver by the white areas and vice versa. This gives the change in the voltage level at the receiver output, but it usually changes the voltage can not be accepted as a TTL logic level. To be able to read by the microcontroller, the sensor voltage should be adjusted to TTL voltage level that is 0-1 volts for logic 0 and 3-5 volts for logic 1. This can be done by installing the operational amplifier is used as a comparator as shown in the picture above.
Op Amp is used as a comparator LM324 IC, because IC is able to work at VCC 5 volt range and there are 4 in 1 Op Amp IC corresponding to the number of sensors are used. The sensitivity of this sensor can be set through R9 which controls the comparator reference point.
Maximizing Sensor Line Follower Robot

Line follower robot sensors can be made with a combination between LED and photo diode. Line follower robot sensor configuration is good to be able to read the track with a hard and fast. To make the robot sensor is firm and fast can not merely rely on the ability of photo diodes and LED configurations only. As an alternative to maximize the performance of line follower robot sensors can be added to the voltage comparator with Op-Amp. Sensor circuit line follower robot equipped with a voltage comparator that is ready to be connected to a microcontroller or PIC can use the following series of robot sensor.
Line Follower Robot Sensor circuit with voltage comparator

voltage comparator
Voltage comparator Circuit


Function of the voltage comparator circuit line follower robot sensor above is:

  1. Reinforce the logic level sensor output
  2. Amplifies the sensor output signal
  3. Control and determine the reference point sensor
  4. Reinforce the logic level sensor output is intended to avoid the floating logic conditions, with the goal of getting the process of transition logic (high) to a logic low (low) or vice versa in a fast sensors. So as to enhance the response to the sensor readings track work.

Sensor output voltage levels should be read as well by the TTL logic processor. If the robot sensors rely on photo diodes and LED configurations, then during the reading process is fast track, then the resulting signal has a logic low loevel differences and can not be read as a TTL logic. Therefore, robot sensor voltage levels are still weak need to be corroborated by a voltage comparator, so the TTL logic level differences firm with a strong signal.

The purpose of controlling and determining the sensor reference point is, we can determine the position of the robot sensor readings can be considered as a logic high or logic low.  Choosing process reference value line follower robot sensor readings can be done by adjusting VR1 10kOhm the series "Line Follower Robot Sensor Voltage Comparator With" above.

Line Follower Robot Sensor Concept

Line Follower Robot Sensor Concept - Sensor line detector is used in line follower robot is usually based on the principle of light reflectionto distinguish the line with the background color. In the dark color of the light absorption is greater than that of white light reflected to the sensor becomes smaller.

Position sensor to track the trajectory and the example circuit.

Line Follower Robot Sensor Concept
Line Follower Robot Sensor Concept
Light used for the introduction of the line is usually visible light and infra-red. Sensors for visible light are commonly used are LDR (Light Depending Resistance), while for the infrared light is atransistor and photo diode (photodiode). Sensors placed at the bottom of the frame to hang the robot, so that its position can be located just above the track to be read.

Know the Line Follower Robot


Line Follower Robot Glance - Line Follower Robot - a kind of robot which included into the category robotmobile are designed to work in an autonomous and have the ability to detect and move to follow (follows) the existing line on the surface. Control system used is designed to feel that there are pathways of movement and maneuver in order to remain able to follow that line. Robots of this type quite a lot of interest for those who are just learning to robot technology. Even competitions Line Follower Robot, often held regularly at various universities .In industry, robots of this type is often used to to move goods from one place to another. By modifying slightly the sensor line follower robot can then be developed into a Wall Follower Robot, a robot that can move around the wall.

Driver On Line Follower Robot

Motor Drive On Line Follower Robot - To move the Line Follower 2 options can be used, namely motor or DC motor servo motor. If you want to use a DC motor, it must use a DC motor is mounted gear system (geared motors DC).Kind of like it is still difficult to find in the market, so the choice often falls to the servo motor.Another advantage of the servo motor is a servo motor can be controlled directly from the microcontroller PIC16F84 with no extra-Driver IC again.

Motor Drive On Line Follower Robot
Motor Drive On Line Follower Robot
Wheel Drive On Line Follower Robot - Wheels are used in line follower may vary - kinds, ranging from the brand, type, dimensions, and so forth. Line Follower Robot are generally categorized based on the number of wheels it has.Starting from the robot with two wheels, three wheels or four wheels. But that is commonly used is a robot with three or four wheels.

Wheel Drive On Line Follower Robot
Wheel Drive On Line Follower Robot 

Placed behind a pair of wheels connected by two motors each - each have an independent pace.It is important that the robot can turn left and to right and set the desired rotation rounds. While the front wheels could use a caster wheel that serves as a buffer. Many brands of caster wheels that can be used, one of the most famous is from the manufacturer Tamiya. However, no cane akarpun so - if we want a cheaper and sometimes free, odor-preventing former rodadeodorant can used as a caster wheel.

In the Line Follower Robot Microcontroller Many types of microcontrollers that can be used in line follower robot, some examples include AT89C2051 (8051 Core), AT89C51 (8051 Core), ATmega8 (AVR Core), ATmega16 (AVR Core) and many more.

In the microcontroller, the program will be included so that the robot can adjust the rotation speed of each motor and able to perform the desired movement. Because the line follower robot speed is high enough, then some of the control algorithm needs to be applied to a robot capable of running smoothly. Control that can be a continuous control, PID, fuzzy logic, or the other.

Speed setting is important, especially when faced with change of trajectory, from a straight trajectory to bend or otherwise of the bend to the straight path. Just as when the robot moves fast and then find a corner, then the robot would be bounced. That requires a series of dynamic motor speed control depending on the type of trajectory is traversed. If the robot goes straight, the speed of the robot cultivated at a maximum. If the condition of the bend, then the speed is reduced depends on the sharpness of the bend. In essence, the speed of the robot is made flexible according to the situation on the ground. On the robot, the speed reduction can be done using the PWM (Pulse widht Modulation) controller, namely the reduction of speed by reducing the current to the motor.

Car Stereo Speaker


Car Stereo Speaker: Let Your Car Stereo Speak For Itself - Even if you’re not a car audio connoisseur, it’s easy to be impressed with a car stereo speaker while looking around in an expo or convention. They’re the first thing you’ll probably notice, they come in different colors, shapes and sizes. Those big throbbing concaves blaring incredibly low bass lines or cool little tweeters whistling out seething treble sounds.

How to : Installation A Car Stereo


Car Stereo Installation Guide - Want to save some money? Ever wonder if you could do a car stereo installation yourself? Yes, you can do it yourself! Go ahead, spend that money on your hardware! Don’t spend it on labor. Besides, doing a car stereo installation yourself can be a very rewarding experience, not to mention you can learn a lot from it too. Nothing beats the feeling of seeing your “creation” in action, running smoothly and perfectly.

Sony Car Stereo


The Sony Corporation, based in Tokyo is a leading manufacturer of audio, video, communications, and information technology products for the consumer and professional markets. Their music, motion picture, television, computer entertainment, and online businesses also make Sony one of the most comprehensive entertainment companies in the world. 

Kenwood Car Stereo | Car Audio.

Kenwood Car Stereo Lets You Listen To The Future Of Car Audio. - This brand is a household name for every car audio enthusiast. Mention the name Kenwood car stereo and they will know what you’re talking about. 

Kenwood Car Stereo | Car Audio.
Kenwood car stereos have produced high quality consumer electronics, test equipment and communication equipment since 1946. Kenwood car stereos primarily specialize in the design, engineering and manufacture of wireless communication infrastructure but are also renowned in the production consumer mobile and home entertainment systems. Kenwood car stereos are also committed to creating the finest quality components with state of the art technologies that has earned them a huge following in the audio products scene.

At present, Kenwood car stereos have a very impressive product lineup that would make anyone drool over, whether he is an audio enthusiast or not. For the regular Joe who isn’t really into technical stuff, and is just looking for something nice to put into his ride, Kenwood car stereos offer sleek designs that will surely satisfy anyone’s craving for aesthetic. Tech-freaks and geeks will also be impressed with the specs a Kenwood car stereo has.  

Kenwood KVT-717DVD 7.0

A lot of Kenwood car stereo units nowadays include popup LCD panels for watching VCD/DVD movies. The Kenwood KVT-717DVD 7.0” Wide, Fully Motorized In-dash Monitor DVD/WMA/MP3 Receiver is a good candidate for any situation. 

• 7.0 inch Wide Color TFT Active Matrix Display
• Full-automatic Open/Close with slide and angle adjustments
• Interactive Touchscreen Control with OSD
• Audio Easy Control Mode while Playing Visual Source
• Selectable Wall Paper (6 Patterns)
• Installer/Backup Memory of Audio/Video Setup
• Maximum Output Power : 50W x 4 (MOSFET Power IC)
• 3 Preouts with 5V Pre-out Level
• 2 RCA AV Inputs / 1 RCA AV Output
• Video Input for Rear View Camera
• RGB Input for Navigation System
• System Q/ System E's+
• DVD Menu Direct Touch screen Control
• MPEG 1/2 Video files (.mpg) and JPEG files (.jpg) Playback
• Dual Zone Source & Volume Control
• DVD±R/RW Compatible
• External Media Control — iPod Ready
• Optional TV Tuner 

For those who might not get what the hell all of these means, just imagine this: a really thin monitor panel that smoothly retracts and extends at the push of a remote, crystal clear movie and picture playback, all encased in a beautiful black matte finish polymer casing done with a space age design. 

If all you want is a just a regular car stereo for playing CDs’, listening to mp3s or the radio, Kenwood car stereo have a lot to choose from. A good head unit would be the KDC-MP928 AAC/WMA/MP3/ CD Receiver with External Media Control. 

• Auto-Slide Detachable Faceplate
• Rotary Encoder & Jog Control Knob for Easy Operation
• 4096 Color OEL Display
• Display Customize Function
• Maximum Output Power : 50W x 4 (MOSFET Power IC)
• ACDrive (Advanced Codec Drive)
• AAC/WMA/MP3 Playback
• G-Analyzer (Graphic Motion Analyzer)
• Built-in DSP : DTA/System Q(4band P-EQ)/Digital E's/SRS
WOW Digital Effect
• O.D.D. (Offset Dual Differential) D/A System for Sound Quality
• Installer/User/Backup Memory of Audio Setup
• SIRIUS Satellite Radio Ready
• HD Radio Ready
• External Media Control — iPod Ready
• Dual Zone Source & Volume Control
• AUX Input
• Gold Plated 3 Preouts with 5V Pre-output Level

The Kenwood car stereo auto slide detachable faceplate allows you to take the faceplate (one which has all the buttons) in order to prevent theft by taking away the functionality of the unit left in the car. 


A Pioneer In Their Own Right: The Pioneer Car Stereo

Look at any good car stereo system and you’ll probably see a Pioneer car stereo unit plugged into the console. Alongside with quality speakers and a strong lineup of accessories like LCD panels and navigational devices, Pioneer products/Pioneer car stereos have earned a huge following the world over.  

Great Brands for Good Prices on Auto Sound Systems

If you are one of the many people across the country considering a new auto sound system, there is a great deal of good news. First of all, it is very possible to find a good bargain on a nice sound system for your car, truck, or SUV if you are willing to shop online and install the system yourself. The problem often lies not in the cost of the system but the price of the installation. However, the cost of installation is well worth the dollar amount for many of us who really have no clue what to do as far as a project of that scope goes. I for one am among the electronically challenged and not really willing to risk my dash board for an experiment in frustration and failed electronics.

Modifying your Auto Sound System

If you are one of the many people around the world who happens to be into cars and the new pastime called 'modding' I'm sure you have considered the implications of modding your auto sound system. For many the idea of modifying an automobile is very exciting. It's a way to take the standard canvas purchased from the dealer and turn it into a work of art that you drive to work and play each and every day. The same theory holds for your sound system as well. You can take the basic pieces and parts and turn them into something so much more than they were to begin with.

Speakers Play the Sound but Auto Sound Systems Make It

When you look at auto sound systems it is important to pay close attention to the speakers on the system you are considering. You will find that there are all kinds of components, pieces, and parts that go along with a proper sound system in the world of today's music systems. You need to pay special attention to every single detail along the way of choosing the system that will meet your needs, your budget, and your lifestyle with the most bells and whistles to spare.

The Risks of Self-Installation of your Auto Sound System

The risks of installing your own auto sound system may be greater than you realize. The fact is that there are people that are professionally trained in the installation and proper handling of these delicate sound systems for a reason. If it weren't a difficult task they wouldn't be able to demand the rather hefty price tag that most installation centers charge. The problem is that mistakes can actually cost more than the installation. If you aren't one hundred percent certain that you can handle the installation process alone it is best to leave it up to the experts.

Evolving Technology and Auto Sound Systems

Finding auto sound systems that can keep up with the constantly evolving technology of today is a real challenge for many car and sound enthusiasts not only around the nation but also around the world. There was a time in the not so distant past when car stereos that had CD players or CD disc changers where the cutting edge of technology. New technology however has nearly rendered the CD players in cars as obsolete as long forgotten 8-track players. The sad news is that many carmakers are clinging to the old days and only offer something as modern as cassette players as standard equipment for auto sound systems.

Technology Spending Limits and the Auto Sound System

We live in a world that is constantly changing and evolving. We see it every time we buy a new car, a new television, or a new computer. We see it every other month when the iPod is putting out a new an improved model that offers more features, more disk space, and more everything, in a smaller package (well not since they added video but until then, the gadgets were getting smaller while the features were growing exponentially). The truth of the matter is that technology seems to be advancing at a rate that is nearly impossible to keep up with. That being said, you can quite literally drive yourself insane by trying to keep up with the pace of modern technology.

With Auto Sound Systems Newest Technology isn't Necessarily Greatest Technology

We live in a world where music is our constant companion. We take it with us to the beach, to work, to exercise, even while riding bikes or talking on our cell phones. It only makes sense that in our cars we would like to have the best possible auto sound systems our hard earned dollars can buy. The problem is that new technology is being introduced to the market each and every day and many of us feel as though if we hold our breath just a little bit longer something even better and more spectacular will come along. We know that we will absolutely want to kick ourselves if we buy in to "this or that" company's auto sound system that was phenomenal yesterday, just before the next great thing hits the market.

The Alpine Car Stereo

We all know that brand names matter when purchasing car audio hardware. There are brands that are surely more reputable than others. When you are at the store and they offer choice after choice after choice, suddenly you feel overwhelmed on what really to buy. But you can be assured of one thing, if they offer you an Alpine car stereo you can’t go wrong with it.

Thursday, March 29, 2012

Top 5 Reasons for a New Auto Sound System

If you are a fan of David Letterman, I'm sure you've seen and heard his nutty and often hilarious top 10 lists. He has become famous for them and they have been often imitated but never quite aptly duplicated by many around the world. I have no intentions of trying to claim or ever hope to be as funny as Letterman but I would love to create a top 5 list of why you need a new auto sound system. The sad part is that some of this may ring true for many, if not, I bet it will at least make you smile.

Self Installation of Auto Sound System can Save Serious Cash

If you are seriously hoping to save a significant chunk of change when it comes to your auto sound system, you should consider saving on installation. Under ordinary circumstances I urge people to be very, if not overly cautious when it comes to installing your own auto sound systems. The thing is, that some people really are talented when it comes to activities such as this. Beyond talent, some people have frightening skills with electronics and if you are one of those, then by all means consider the money you could save yourself (or the extra money you'd have to invest in your system?).

We all know that money doesn't grow on trees and when you've been saving up for quite a while to get the sound system you really want it's a serious joy killer to have to wait another month or two in order to save up enough money to cover the cost of the installation of your sound system. If you or someone you know and trust (trust being the operative word in this instance) can do the work, it makes no sense from a fiscal point of view to pay someone else to do it.

That being said, if there are any doubts about your skill or experience you might want to at the very least get a second opinion or price installations in your area to see if it might actually be worth saving a little more. Time is another important issue when it comes to the installation of an auto sound system. It doesn't matter how capable you are of making the installation if you simply lack the time to do it. In cases such as this it would have been just as wise to go ahead and pay someone to make the installation. It makes much more sense to me than having the system sitting in a box for months on end while you wait for the time to get it taken care of.

I am one of those people who firmly believes that time is money. Time lost from work is expensive. This is especially true when the times of 10 or more people are lost. It adds up quickly no matter if you have a small or a large company. Time is also (unfortunately) the one commodity in life that you can never recover. No matter how hard you try you cannot recapture time that has been lost. If you have children you know exactly what I'm talking about (particularly if your children are either teens or grown and gone). You cannot recover lost time so make sure you aren't wasting your time by trying to install an auto sound system that is beyond your abilities.

Don't fret though. Most of us find that at some point in our lives we are limited by either time or money if not both. If everything was quick and easy we wouldn't really have anything worth working for would we? Consider all your limitations when planning and purchasing your auto sound system and make sure that the system you select falls squarely within your ability to install, your time limit for installation, or your price range for affording to pay for the installation. Whether you decide to do your own installation or have a professional installation of your auto sound system the prize is the superior sound quality you will be able to enjoy.

The New Technology of Auto Sound Systems

So what kind of auto sound system really seems to float your boat? Are you the type of person who wants the simplest sound system on the market today? Will you be content with talk radio and a few FM radio stations? Do you need an 8-track? How about a cassette player? I hate to say it, but if you are still living in the past, you will have a rather difficult time finding an audio system for your car that can accommodate your desire to hold technology behind the current trends. These things simply do not sell. You may find an occasional auto sound system that still has a cassette player but for the most part you will find that the market for this device is almost as limited as the quality of the device itself.

The New Technology of Auto Sound SystemsToday's auto sound systems are more sophisticated than they have ever been before. Gone are the days when you had to turn a dial to find a radio station. Today you can set your car to scan the stations until you find one you like. You can even set them to scan radio stations by type. For me, that was a great invention as I find country music rather sad and always end up finding the one song that will bring uninvited torrents of tears while flipping through the stations mindlessly as I drive. Being someone that hates to cry on any given day it is bad enough to cry. Add to that the fact that I'm probably driving at about 75 or so miles an hour and you can probably see where this is problematic. I do best whenever I can avoid country music stations all together.

Another great technological advance when it comes to the auto sound system is individual volume control. No longer do you have to listen to your mothers, brothers, sisters, or Aunt Sally's music blaring, you can slide on your headphones and mute out the noise of the rest of the world. If your vehicle has a truly sophisticated sound system, you can even change the radio station in order to find music that is much more suitable for your musical tastes.

You should also be aware that today's auto sound systems are much more user friendly than those of days past. Most displays are digital and easy to read. You might even notice that many can read the local radio stations codes and formats and will list the songs that are playing for you. You'll never have to wonder about the name of that great song you just heard or even who sang it again. It's right before your eyes as you are driving along and listening to awesome tunes.

The best auto sound systems offer not only CD options to drivers and passengers alike but also the ability and capability of reading and interpreting MP3 data as well. More and more people are turning to MP3s for their primary source of music. It takes up far less space than your average CD holder and holds a lot more music. You can download only the songs you like without purchasing an entire CD full of songs only to find that you only liked one song on the entire CD. You can put your favorite songs on a memory stick and bring them along for the ride. It's a great way to enjoy music in this day and age. I'm quite literally surprised that I haven't seen an iPod auto sound system pop up on the radar yet and am seriously expecting to see one any day now, literally.

Regardless of whether or not you wish to enter the modern era of music and music listening it's upon us. However, if you are truly opposed we could always find you a nice supply of Sinatra in MP3 format in order to make the transition a little more comfortable for you.

Is Bigger Better in Auto Sound Systems?

When it comes to auto sound systems, one question seems to be repeated often-is bigger better? The honest answer to that is not by a long shot. There are many excellent quality sound systems that will not require the backseat and your first-born in order to enjoy wonderful quality of sound and music as you drive along on your daily commute. One thing that is important to remember is that dynamite does in fact come in small packages. The same can be true of a good quality sound system for your car, truck, or SUV.

A Good Auto Sound System is a Requirement not a Luxury

How do you decide which auto sound system is best for you? This is a question that many consumers ask in the U. S. each and every day. The truth is that only you can decide what kind of sound you find enjoyable and what you are seeking in the sound system you will ultimately purchase. A good sound system will greatly improve how you feel about not only the vehicle you drive but also your disposition after your daily commute. It may seem like such a small thing, the changing of a sound system, but it does seem to have such a profound impact on how we start our days. Of course we all know that getting your day off to a good start sets the tone for the entire day and if that day is Monday it sets the tone for not only the day ahead but also the week to come.

The Importance of a Good Auto Sound System

If you spend a good deal of time in you car, and yes, the morning commute to work and the evening commute home each and every day definitely counts, you are probably more than slightly aware of the benefits of having a good auto sound system. Your sound system is your companion in your travels most of the time. Even those who have children often spend a great deal of time driving alone.

XM Satellite Radio Vs. Sirius for your Auto Sound System Selection

If you're in the market for a new auto sound system you might want to seriously take a moment and consider whether or not you would be benefited by subscribing to either Sirius or XM Satellite Radio. Both of these subscription-based services have something wonderful to offer their subscribers and both of them require specialized equipment in order to operate. This means if you are going to wish to use either service, you will need to have decided which service before you have your auto sound system installed.

Professional Installation of Auto Sound Systems Imperative

One of the biggest decisions that people need to make when deciding on an auto sound system is the decision of whether or not have the system professionally installed. On the one hand, it will add a pretty hefty fee to the bottom line but you just might find that the fee is well worth the expense you'd have to pay to fix any mistakes you might make along the way. The truth of the matter is that installing an auto sound system is not an easy task and requires no small degree of skill and concentration. I'm not sure about you but I'm in short supply of both when it comes to technical matters such as this and would much rather not risk my car, which will cost a lot more to repair if I make a mistake than the couple of hundred dollars that professional installation might require.

The Reasons Why you should add a DVD Player to your Auto Sound System

When you are in the process of selecting your next auto sound system you might want to check out the systems that include other entertainment features such as games and DVD players. This may sound a little simplistic to some but if you've ever driven cross-country with children, you know what I mean when I say it is worth the investment to have one installed and have it installed correctly.

Auto Sound Systems are Becoming Entertainment Systems

If you've been shopping lately for an auto sound system then I am fairly certain that you've come across several full entertainment systems among those in the running for your audio and entertainment dollars. Vehicles today offer everything from DVD players, individual speakers, headphones (also individually adjustable), and even dual players that will allow one different audio to be played in one section of the vehicle than another. In addition to all of these wonderful and nifty devices are many more devices that are meant to tempt, sway, and convince you to spend even more money on the auto sound system of your dreams. Some of these even offer MP3 players that connect directly to the audio system of your car, truck, or SUV.

Auto Sound Systems One Piece at a Time

Those who are in the market for auto sound systems are probably well aware of the many decisions that need to be made throughout the process. Gone are the days when you went in, pointed to a box and walked out with all the pieces, parts, and components you would ever need for a really kickin' sound. The truth of the matter is that there are many pieces and parts that work together in order to create the ultimate sound system and everyone seems to have different requirements, styles, tastes, and budgets to work with.

Ebay has Surprising Bargains on Auto Sound Systems

Articles - Anyone that is familiar with Ebay knows that it is a literal one stop shop when it comes to hundreds of thousands of unique and common new and used items. It should then, come as no shock that Ebay is also a great place to find excellent bargains when it comes to auto sound systems. Yes, you heard that correctly. While you can't exactly test out your tunes over an Internet connection you can generally check out the exact same brands you'll find at Ebay in your local automotive stereo and entertainment dealerships. The difference is that you can generally get your hands on the merchandise from Ebay at a fraction of the cost you would pay retail.

iPod and the Auto Sound System

The iPod story seems to be that of a charmed life. If you haven't taken a look around there are all kinds of devices and accessories that are created in order to use right along with the wildly popular and successful iPod product offered by Apple. In fact, I can't think of a better coup for Apple to have pulled off against the giant PC industry, even Microsoft's new product the Zune is having a great deal of difficulty even catching up to the sales that iPod seems to have no trouble garnering. The success is something that may define explanation but could have a great deal to do with the equally popular accessories and adornments that are made for each and every iPod product.


iPod and the Auto Sound SystemYou might be wondering exactly what this has to do with auto sound systems but those are just another of the many great iPod accessories that can be found in the market place of today. Seriously! Even some car manufacturers are having upgrades that include iPod adapters that allow drivers to play music from their iPods through the tuning device on their auto sound systems. It almost seems too good to be true when you consider that you will not have to risk life and limb by fiddling with your iPod device when looking for that one obscure song somewhere on your list. There are other car stereo makers that have devices and adapters that read and play music from the iPod but you must use the actual iPod to make your selections and any changes. At any rate, when carmakers and stereo manufacturers such as Pioneer and Alpine are creating stereos that have the iPod in mind you can rest assured that it is a cultural phenomenon and not some fluke to be taken lightly.


In addition to auto sound systems you will find iDogs, iPets, iPod covers, iPod players (speakers and docking stations that you plug your iPod into in order to play without the headphones), iPod alarm clocks, and my personal favorite iBaby (this is a stroller made by Kolcraft that has an iPod, speakers, and adapter built in so that baby can hear his or her favorite tunes while being strolled about the town), or the iCrib (another nifty iPod device designed to keep baby pacified-hopefully this nifty gadgets are drool proof). Needless to say there are times in life when it's all about the accessories and I have yet seen another maker of MP3 type devices hold a torch to iPod when it comes to offering options for buyers to personalize their music makers.


If you are in the market for an auto sound system, chances are that you either already have an iPod or are seriously not opposed to the idea of owning one. If you either or both are in your near future I highly recommend you consider purchasing an auto sound system that will be completely compatible with your iPod system or any other MP3 type player you choose to use. I do believe however, that you will find better options designed with the iPod in mind as none of the other brands (thus far) have nearly the buyer base and purchasing power of iPod owners. No matter how you feel about it, all indications are that iPods are here to stay and you may as well jump on board when it comes to your auto sound system as well.

Auto Sound Systems are more than meets the Eye

The auto sound systems of today are much more involved and complicated than the simple car stereo and speakers of years long past. Today's sound systems have all kinds of bells and whistles that many us could have only imagined during our younger years. In fact, it is quite possible that many of us did imagine these and those imaginings are how they came to be. One thing you need to do before you even begin to put the auto sound system of your dreams together is learn what kinds of components exist, how they work together, and which ones you really think you need as part of your auto sound system and which components you honestly feel you can live without.

Auto Sound Systems for the Budget Minded

Despite popular belief, it is quite possible to get a great quality auto sound system even if you are operating on a limited budget. I completely understand your skeptical glances and the comments and grumbles that being on a budget means different things to different people. I can tell you without a doubt that you can get a really nice sound system for your car, truck, or SUV even if your budget is less then $300.

Auto Sound Systems that Offer More

Technology is advancing at an alarming pace. Many of us in the market for auto sound systems have been more than surprised at many of the choices on the market today. Sound systems have gone far beyond the simple tuners of days past and are incorporating other features into the sound system as well. Today you can find all kinds of bells and whistles with price tags to match. It would be very easy to spend two or three thousand dollars in the purchase and installation of a very nice auto sound system in your car, truck, or SUV. Most of us, however, would do just as well with a simple three hundred dollar sound system and would be unlikely to use many of the features that the higher price sound systems offer.

Auto Sound Systems Should be Superior Quality

I for one can't imagine entering into my daily commute without the sound assistance of a good auto sound system. Music in the morning is as necessary for me as oxygen and caffeine. If I live without any of those above my day is already up and running with wrong foot first. Music is a very important part of any given day for someone like me.

My wake up call in the morning comes in the form of my favorite radio station and from that point on I have music as my companion for the vast majority of my morning routine. That is of course with the exception of children and husband and some of their more insistent demands for food, money, and last minute homework crisis. I will gladly take my music and tea most mornings and skip the drama.

The point of all this is that I am not alone in my morning preference. If I were there wouldn't be so many variations of the music driven alarm clock. Today you can even have CD player alarm clocks in order to get you up and running to your favorite tunes. Of course this brings me to an important point. A good auto sound system will sound much better than your morning music wake up call. Most alarm clocks will not have the best quality of sound. They are designed for minimal space, minimal intrusion, and to be annoying enough that you will get up (eventually) and turn them off. If the music is good and the quality even better, most of us, can manage to incorporate the music into our dreams and go right back to sleep.


While you do not want your auto sound system to necessarily put you to sleep you do want it to be enjoyable to listen to. You are after all most likely shelling out a good portion of a month's salary in order to pay for it. Some may say this is extravagant but many people spend more time each week in their cars than they do in front of their televisions and are much more inclined to spend a great deal more on big screen or LCD televisions for their homes. I like being surrounded by nice things and music is one of those things. A great auto sound system is one way that I can bring music into my life day in and day out. I am quite certain that there are others out there just like me. Just like the alarm clock radios, there are many wonderful auto sound systems on the market today competing with one another for a slice of the music lover's pie. That would not be the case if there were only a select few of us who enjoyed great music.


The trick is always going to be finding the sound you like at a price that is just as delightful as the sound they provide. A good auto sound system is not an impulse buy. This is something you consider carefully, shop around, and compare prices on before you make the decision to purchase. Also consider things such as free installation and how they will affect the overall price when the time comes. It could very well be that the same sound system will cost a different amount at several different stores, if one of those stores offers free installation (depending on the cost of installation) it may be a much better deal even if the cost of the system is slightly greater than those at the other competing stores.

There are many things to consider when purchasing an auto sound system for your vehicle. The most important of those things is how well you like the system you are purchasing. This is your money after all and you should spend on the systems that sounds best and offers the most features that you desire.

Wednesday, March 28, 2012

How to choose the best for your home theater system

Watching movies is a neat escape from the stressful lifestyle we live in. Watching movies in a wide screen and surround sound take you far away and into the movie scene you are watching. You watch it as if you were there in the movie scene. Of late, we can only experience this escape in a cinema. However, modern technology may be able to provide this same sight and sound experience right in your own living room. We will discuss the basic components of a home theater system in this article. Read on to understand how these basic components can deliver the best cinematic experience to a home theater system.

How to choose the best for your home theater system   Home theater experts state that the most important consideration in setting up a home theater system is the size of the room where you will set up the home theater system. The most important component of the home theater system, which is the television, is dependent on the size of the room. Although, the recommendation is 27 inches television set at a minimum is necessary for your home theater set up. It is also a recommendation that a flat television is good for a home theater system because it exhibits fewer glares and produces a crisper image. 

Another major component of a home theater system that depends on the size of the room is the speaker. The number of speakers for your home theater system is dependent on the size of the room. You may add up to six speakers from the basic three speakers if you want a more lifelike sound. Adding a subwoofer may also be good to achieve a complete surround sound like in the movie theaters. Three speakers should be the minimum; you may go up to six if the room is big. 

Another major for your home theater system is the DVD player. It is a recommendation that DVD players with progressive scan will be the best choice. This is because progressive scan produces sharp and flicker-free pictures. This however points back to the choice of television unit; you may need to check if the flat television set supports progressive scan signals. You may also acquire a five-disk carrousel DVD player. This will avoid having to stand up from your seat to change discs every so often. A minor consideration is the power rating that will determine how loud your speaker can be. Of course, almost all these depend on the size of the room to where the home theater system is going to be set up. Small room requires from few types of equipment, bigger rooms may require more and adding home theater furniture to your home theater system may be best. A bigger room thus requires more investments. A smaller room might require fewer but of good quality equipments to avoid the too basic feel of the home theater system.

Finally, you may acquire a beautifully designed home theater system if you consider hiring a home theater expert. If you can afford this, it will be best for you because the home theater expert will be able to effectively design and set up your home theater system. Your home theater designer may also add some features like home theater seating and other home theater furniture to be able to give the complete home theater package that closely resembles a real movie theater. Having the finest and high-quality home theater system will give you the most sought after set up that you could flaunt and enjoy to the max.

Home Theater Audio Installation

Installation - This for many is probably the biggest reason to go with the prepackaged kit rather than a huge system of individual component—ease of installation. Most, if not all, of the prepackaged kits are very simple to install, which eliminates the need for professional installation and takes a great deal of hassle out of the installation process.

Home Theater Installation
Home Theater Installation

The prepackaged systems are not however, the type of systems you will want to purchase if you intend to build a better system over time as they are not easily upgradeable and most true enthusiasts are often disappointed with the quality of the speakers and sounds that come with these systems. However if you have limited space and limited funds, these systems are often a great place to start when it comes to a home theater. You can always pass it on to your children if you decide to upgrade later.

Box Kit Home Theaters

Box Kit Home Theaters | We live in a world where convenience is increasingly growing in demand. For this reason many home theater buyers expect convenience when it comes to the purchase and set up of their home theater systems. It goes without saying that there are all kinds of consumers in the world and even in matters of convenience supply and demand have not emerged to create a one size fits all society. We all want similar things in many ways yet we still want autonomy and selections from which to choose.

Basic Components for a Home Theater

Many people never bother looking into purchasing a home theater through sheer fear of the decisions that may need to be made in the process. Many among these aren’t even sure of exactly which components are included in a home theater or which ones are needed in order to create an effective and entertaining home theater. For this reason, many people simply do not bother going through the process of looking at their options when it comes to these wonderful systems on the market today much less ever bother actually purchasing one.

Wireless Speakers Offer Excellent Sound Selection


Technology is constantly evolving and introducing new products to an already full line of home theater products. While not the newest kids on the block, wireless speaker technology is also advancing at a rate that prices are no longer out of reach of the average consumer and the value of being able to move your speakers around without going to the work of rewiring is appealing to consumers on an increasingly large scale. 

Tuesday, March 27, 2012

Type of USB connectors

USB connector there are only 2 kinds, namely the connector type A and type B connector, as shown below. Type A connector used to connect the USB cable into the USB terminal on the back of the computer the last few years of production. Type B connector used to connect the USB cable into the USB terminal on the equipment, for a simple USB devices, such as mouse, usually do not use the connector B, to save cost in the cable directly connected to the inside of the mouse.

Properties and USB Capability


  • Easily connected to the computer because it does not need to open the computer cover. Uniform shape USB connector, there are only two forms of type socket.
  • USB cable signals

    USB cable consists of 4 wires plus a conductor wire wrapping, such as the protectors are usually found in the audio cable. Cable number 1 is used to channel resources to the voltage of 5 volts, if necessary USB devices may draw power from this line and should not exceed 100 mA. Computer equipped with USB capability, is required to provide power at 100 mA for this purpose. USB devices that require more power than the aforementioned provisions, must provide their own resources for the purposes work equipment.

    Parts of the UPS (Uninterruptible Power Supply)


    Uninterruptible Power Supply
    UPS is basically composed of three main components, namely:
    1) Rectifier-Charger
    This section is used to transfer circuit and battery charging. Rectifier-charger circuit block is going to supply the power needed by the inverter under full load and at that time to maintain the charge in the battery. Besides these blocks must have the ability to drain the power output of 125-130%.

    Video Distribution Amplifier

    With the amount of equipment during in entertainment centers at present the need to survive able to vary the profit of the audio otherwise capture on film sign is required. I found this instance circuit ready to lend a hand while used in conjunction with the Universal Descrambler and a Stabilizer circuit I built instead of making copies of cassette tapes. It not just allowable me the capacity to fine melody the video strength it and helped me redouble the recorded audio which typically becomes poor as making tape copies. Circuit act is straight redirect designed for amplifier circuits. The minute channel for the audio amplifier is made up of the same components excluding the other partly of IC1 is used. Pin 6 & 5 are inputs and 7 is the output.
    Video Distribution Amplifier
    Video Distribution Amplifier

    Monday, March 26, 2012

    Automatic Water Pump Controller Circuit

    Automatic water pump controller is a series of functions to control the Automatic Water Pump Controller Circuit in a reservoir or water storage. As the water level sensor made with a metal plate mounted on the reservoir or water tank, with a sensor in the short to create the top level and a detection sensor for detecting long again made the lower level and ground lines connected to the bottom of reservoirs or reservoir. The series of automatic water pump controller is designed with 2 inputs NOR by 4 pieces and relay that is activated by the transistor. Automatic water pump circuit requires +12 VDC voltage source and can be used to control the water pump is connected to AC power . Here is the complete series of pictures.

    Power Supply with tube

    Power supply with Z2C tubes are designed specifically to provide power supply voltage to the EL-34 tube amplifier push-pull in the previous article. Power supply with Z2C tube to tube power amplifier is made with a tube rectifier Z2C. Just as the power supply for power amplifier tube earlier, power supply also uses a filter 3 levels with kapsitor electrolyte. Circuit power supply with tube rectifier Z2C can give +210 VDC output voltage. A complete range of power supply for power amplifier tube can be seen in thethe following figure .

    Sunday, March 25, 2012

    Voltage-to-frequency converters LM231/LM331

    The LM231/LM331 family of voltage-to-frequency converters are ideally suited for use in simple low-cost circuits for analog-to-digital conversion, precision frequency-to-voltage conversion, long-term integration, linear frequency modulation or demodulation, and many other functions

    Type of Capacitor

    Electrolytic
    - Made of electrolyte, Aluminum electrodes are used by using a thin oxidation membrane
    - Polarized capacitor
    - Cheap, readily available, good for storage of charge (energy) availablein very small or very large values in μF- Not very accurate, marginal electrical properties, leakage, drifting, not suitable for use in hf circuits

    Tantalum
    - Made of Tantalum Pentoxide. They are electrolytic capacitors butused with a material called tantalum for the electrodes. Superior to electrolytic capacitors
    - Nonpolarized capacitor
    - Excellent temperature and frequency characteristics,lack of current-spike-noise. Small size fits anywhere, reliable, most common values readily available.
    - Expensive, easily damaged by spikes

    Polyester Film
    - This capacitor uses a thin polyester film as a dielectric.
    - Nonpolarized capacitor
    - Not as high a tolerance as polypropylene, cheap, temperature stable,readily available, widely used. Tolerance is approx 5% to 10%.
    - Can be quite large depending on capacity or rated voltage and so may not be suitable for all applications.

    Polypropylene
    - This capacitor uses polypropylene film is the dielectric.
    - Nonpolarized capacitor
    - Very little change in capacitance when these capacitors are used in applications within frequency range 100KHz. Tolerance is about 1%
    - higher tolerance is needed then polyester caps can offer . Very small values are available.

    Metalized Polyester Film
    - Dielectric made of Polyester or DuPont trade name "Mylar".
    - Nonpolarized capacitor
    - Good quality, low drift, temperature stable. Because the electrodesare thin they can be made very very small. Good all-round capacitor.

    Epoxy
    - Manufactured using an epoxy dipped polymers as a protective coating.
    - Nonpolarized capacitor
    - Widely available, stable, cheap.
    - large depending on capacity or rated voltage and so may not be suitable for all applications.

    Ceramic
    - Constructed with materials such as titanium acid barium for dielectric. Internally these capacitors are not constructed as a coil
    - Nonpolarized capacitor
    - Well suited for use in high frequency applications. Typically used to by
    -pass high frequency signals to ground. They are shaped like a disk, available in very smallcapacitance values and very small sizes. ,very small size and value, very cheap, reliable
    - Together with the electrolytics the most widely available and used capacitor around. Subject to drifting depending on ambient temperature.

    Multilayer Ceramic
    - Dielectric is made up of many layers.
    - Nonpolarized capacitor
    - Small in size, very good temperature stability, excellent frequency stable characteristics. Multilayer caps suffer from high-Q internal (parallel) resonances
    - generally in the VHF range. The CK05 style 0.1μF/50V caps for example resonate around 30MHz. The effectof this resonance is effectively no apparent capacitance near the resonant frequency.As with all ceramic capacitors, be careful bending the legs or spreading them apart to closeto the disc body or they may get damaged.

    3V to 40 Volt DC Converter Circuit

    Switching regulator subsystems intended for use as dc to dc converters. 3V to 40 Volt DC Converter circuit | The use of switching regulators is becoming more pronounced over that of linear regulators because the size reductions in new equipment designs require greater conversion efficiency. Another major advantage of the switching regulator is that it has increasednapplication flexibility of output voltage. The output can be less than, greater than, or of opposite polarity to that of the input voltage.

    3 Watt stereo amplifier circuit

    3 Watt stereo amplifier circuit using MAX 7910 IC. The MAX9710 a stereo audio power amplifier IC capable of delivering 3Watts of out put to 4 Ohm loads. MAX9710 can be operated from a single 4.5V to 5.5V power supply , makes it ideal for hand held applications.The IC for 3 Watt stereo amplifier circuit also features thermal overload protection.


    Circuit Schematics 3 Watt  Stereo Amplifier MAX 7910 
    3 Watt stereo amplifier circuit
    3 Watt stereo amplifier circuit 

    This  3 Watt stereo amplifier circuit  is suitable for small power audio devices such as radio sets and portable CD players. 5 V DC power supply is used for powering the  3 Watt stereo amplifier circuit. 6V battery with an IN 4007 diode series to the positive terminal of it can also be used instead of 5 V DC supply. The  3 Watt stereo amplifier circuit will get a supply voltage approximately 5 V after 0.7 V voltage drop across diode.

    Friday, March 23, 2012

    Mosfet Snubber Flyback Converter Circuit

    Mosfet Snubber Circuit in Flyback Converter , Typical flyback convertor with drain clamping circuits ZenBlock Zener with integrated blocking diode Philips Semiconductors' new ZenBlockTM replaces double-diode-, RCD- or RC-snubbers in flyback convertors

    Mosfet Snubber Flyback Converter Circuit
    Mosfet Snubber Flyback Converter Circuit

    The new components offer circuit designers the important benefits of lower component count and board usage, reduced EMI, optimal clamping at all loads and higher efficiency. Introducing The new ZenBlock combines the double diode snubber in one package. This leads to the following advantages: 
    -Fewer components. 
    -Reduced circuit board space 
    -Lower EMI by reducing the drain clamp circuit length and area. 
    -Optimal clamp performance at all loads (compared with RCD and RC snubber) 
    -Higher efficiency at low loads (compared with RCD and RC snubber) . Previous circuit related to this circuit : Protection of the Mosfet in flyback power supply

    Protection of the Mosfet in flyback power supply

    PKC-136 PEAK CLAMP CHARACTERISTICS VBR 160Vdc VDRM 700Vdc P 1.5W. See Circuits Diagram below :


    Protection of the Mosfet in flyback power supply
    Protection of the Mosfet in flyback power supply  
    Feature :
    - Protection of the Mosfet in flyback power supply
    TRANSIL™ and blocking diode in a single package BENEFITS
    - Accurate voltage clamping regardless load
    - Reduced current loop
    - Reduced EMI emission
    - High integration
    - Fast assembly
    - Reduced losses in stand by mode

    Audio phase-shift oscillator Circuit Diagram

    Here is a phase-shift audio oscillator with excellent distortion characteristics thanks to “softened” diode limiting provided by the 1N914 and resistor divider and degenerated gain provided by the 68 ohm emitter resistor. For minimum distortion, increase the 68 ohm resistor to a point just below where oscillation stops. A simple buffer may be added for driving lower impedance loads.

    Audio phase-shift oscillator with amplitude stabilization

    The output amplitude will be about 5 volts p-p but one of the 1N914’s 10k divider resistors may be changed for a different output amplitude. The circuit will work well with a power supply voltage other than 9 volts but the 68 ohm resistor may need adjustment

    Preamplifier Circuit Diagram DCF77

    DCF77 Preamplifier Circuit Diagram A popular project among microcontroller aficionados is to build a radio-controlled clock. Tiny receiver boards are available, with a pre-adjusted ferrite antenna, that receive and demodulate the DCF77 time signal broadcast from Mainf lingen in Germany.

    Thursday, March 22, 2012

    Dual Power Supply Circuits

    This is a bench top power supply that can be used to power circuits or devices during development work in the lab. More specifically it is an adjustable, tracking, dual rail supply which means there are two supply voltages, one positive, one negative, that are adjusted by a common potentiometer such that supply voltages are equal in magnitude. It is capable of supplying up to +/- 15V DC at up to 1A. This is sufficient for the majority of small signal electronic projects.

    LED Power Meter

    LED power Meter circuit is a simple RF detector using diodes to charge a capacitor. The voltage developed across the capacitor is indicated by a multimeter set to a low voltage range. The circuit is soldered together without the need for a PC board, as can be seen in the diagram below and paper clips are used for the positive and negative terminals of the multimeter.