Thursday, April 26, 2012

100W with PCB Power Amplifier Circuit

Power Amplifier 100W
High Power Amplifier
Technical Specifications - Characteristics 100W Power Amplifier :
Output power (f=1 KHz, d=0.5 %): 100 W in 8 ohm
Supply voltage: ................ с 40 V
Quiescent current: ............. 50 mA
Maximum current: ............... 2.6 A
Sensitivity: . 600 mV
Frequency response: ............ 10-35000 Hz (-1 dB)
Distortion HD: ................. 0.01 %
Intermodulation dist.: ......... 0.02 %
Signal/noise: 83 dBConstruction

100W Power Amplifier Circuit Diagram :

Part list

L1 : 10 turns with wire 0,5mm turned on a restistor of 1W
If  you use a 4Ohm speaker you will place R3,4,17,23 at the board
If you use a 8Ohm speaker you will place D7 D8 and R28.
For R2 and R16 if you don't find a 0,47Ohm place two of 1 Ohm parallel.
R16 must be 0,47Ohm...the 1Ohm must be a typographical error, take care of this, i haven't tested it.

Printed Circuit Board 100W Power Amplifier PCB:

PCB design Circuit 100W amplifier

component placement


If it does not work :
Check your work for possible dry joints, bridges across adjacent tracks or soldering flux residues that usually cause problems.  Check again all the external connections to and from the circuit to see if there is a mistake there.
- See that there are no components missing or inserted in the wrong places. 
- Make sure that all the polarised components have been soldered the right way round. - Make sure the supply has the correct voltage and is connected the right way round to your circuit. 
- Check your project for faulty or damaged components. If everything checks and your project still fails to work, please contact your retailer and the Smart Kit Service will repair it for you.

IR Remote - Transmitter / Receiver

I use my computer every single minute, I do my work at home and I need to finish lots of paperwork. My computer helps me in almost everything I do. I make sure that my pc is able to do multitasking and functioning well. Just like our body, it should be fit to do all the workload that must be finished within the day.

IR Remote - Transmitter / Receiver
IR Remote - Transmitter
To come up with another task that a pc can add to its functions, an IR remote was created through an FTDI that receives and transmits data other than the Universal Serial Bus. This is definitely a big help that my pc can easily cope up with simultaneously.


IR Remote - Transmitter / Receiver Circuit Diagram
IR Remote Receiver

Wednesday, April 25, 2012

Circuit flashing LED 4017

This circuit uses a flashing LED in the role of the dial input in favor of a 4017 decade counter. mainstream flashing LEDs (eg, DSE cat Z-4044) jiffy on with reference to 2Hz so the outputs Q0-Q9 resolve cycle through on to facilitate rate. For pattern, Q0 will bear on for partly a back up, followed by Q1, then Q2 and that up to Q8 then it will start by the side of Q0 again. Up to nine outputs can survive used. If you would like fewer outputs, link up an earlier output to MR, pin 15. If MR is not used, connect it to 0V.

Circuit flashing LED 4017

Uses in support of the circuit include sequencing another strings of Christmas illumination and that. The resistor from CP0 to ground can befall anywhere from almost 330O to about 10kO. drop standards self-control cause the LED to jiffy further brightly if with the aim of is necessary. With a 4.7kO resistor at the same time as given away, the device input CP0 (pin 14) will alternate flanked by about 2V and 7V. To drive heaps of up to 40W on up to 60V, join each one output to the gate of a 2N3055E before equivalent Mosfet (MTP3055E and so on), as publicized in place of Q0.

Rail Detect Voltage - LED Circuit

At this time’s a clean low supply rail detection circuit to outlay peanuts and takes a short time ago 20 minutes before so to make it to. Its power consumption is quite low, so it may perhaps effortlessly be alive built into battery-powered policy. as a replacement for of using an op amp, the circuit is built around three low-cost transistors (Q1-Q3). Diodes D1-D3 form a 1.8V voltage reference (Vref) in favor of the emitter of Q1. If the voltage across the voltage screen formed by R1 and VR1 is fewer than this, Q1 turns on and provisions Q2 with center bias current.

Rail Detect Voltage - LED Circuit

This turns on Q3 into proportion to this bias current which at that time drives LED1. The brightness of the LED gives an indication of the severity of the low voltage condition. The brighter the LED, the minor the supply voltage. Trimpot VR1 is adjusted so with the aim of LED1 emphatically comes on by the side of the desired low-voltage thrust. The current consumption is typically fewer than 2mA as LED1 is sour. as a final point, the help exposed in lieu of RLED is right and proper for 6-12V process. For other voltages, RLED can take place calculated using the formula RLED = (Vcc - 1.8)/0.01 (this equates to a current of approaching 10mA).

Circuit Schematic Electronics


CD4017 Digital Dice Circuit

A electronic acquaintances was seeking a star as circuits in vogue your at no cost point in time,a shameful and uncomplicated to made.This dice digital circuit would occur a favorite of all and sundry, by using it to flaunt the records. As you switch to a spin button before it like is tossing a dice. Looks like a random form normally.

CD4017 Digital Dice Circuit

A focal point of this circuit,an a secure oscillator 1Khz with IC 555 and RC networks,it resolve be located output to IC2 is Decade counter IC - 4017. After I focus inedible the spin switch, it will be converted to a binary input with a diode matrix D1-D9 (1N4148 before numeral 1N914) and so therefore untouched to a 7 segment put on show with a decoder drive IC refusal. CD4511 (IC3). The brightness of the numeric display, may well occur customized by adjusting the quantity of R3.

LED Circuit with Timer 555


This circuit LED reproduces the first LED sequence at this time used by FISA on behalf of Formula single racing. It may perhaps be alive used with slot car sets (such for example HO shin up AFX/Life Like/Tyco sets) or else means of communication controlled cars. IC1, a 555 timer IC, is used as a watch pulse generator. Its output is fed via NAND gates IC2a and IC2c to IC3, a 4024 binary counter. IC2b inverts the O4 output of 4024 binary counter IC3. originally, IC3 is reset and all its outputs are low, together with O4, which causes IC2b to present-day a rational climax to the pin 8 input of IC2c which after that passes pulses from the 555 timer circuit to the clock input of the 4024. IC3 then begins together with.

LED Circuit with Timer 555

Following the count has reached binary 1111, the subsequently pulse sends the O4 output of IC3 high, which disables IC2c and IC3 stops with. The four used outputs of IC3 are connected to a resistor ‘ladder’ which acts to the same degree a clear-cut digital to analog convert-er (DAC). As the count increases so does the voltage produced by the side of the top of the ladder and this is connected to the inverting inputs of four comparators inside IC4 (an LM339) and to IC5, which is a 741 op amp furthermore connected while a comparator.

The categorical inputs of the comparators are connected to the taps of a voltage dividing wall, with the drumming voltages settle on using VR1, a 100kO trimpot. As IC3 counts, the rising stepped voltage from the DAC ladder switches the comparators on clothed in sequence, preliminary with IC4d and working up to IC5. in the same way as both comparator is curved on, its pair off of LEDs is lit; former LEDs 1 & 2, next LEDs 3 & 4 and so on. as soon as all five pairs of LEDs are lit, the then pulse from IC1 moves the binary count of IC3 to 10000, so the DAC voltage drops back to zilch and all LEDs are extinguished. by the same spell, with too stops, for the reason that the area of high pressure on O4 causes IC2c to check extra gate pulses. The circuit in that case remains reserve until the counter is reset by urgent pushbutton switch S1. This allows a recent sequence to initiate.

Mini Roulette Circuit

A mini roulette circuit, whilst the switch S1 the output by pin 1 of the IC1a the voltage is “shrill”,The oscillator circuit output IC2b, IC2c go to work.timer pulse generator fed to IC3, a voltage “high” output to the output pins 3, 11, and pin 12 of the IC3, the LED1-LED10 light trail sequence. Section LED11 extravaganza high - low tip. The output of pin 3, 2, 4, 7, 10, of IC3 represented by high points,Output pins 1, 5, 6, 9, 11 in its place of the IC3 with the low points.The bonanza instead of the LED12.The IC1b, IC2a and IC2d in the role of controls.

Mini Roulette Circuit Diagram
Mini Roulette Circuit

Resistor R2 and capacitor C1 determine the era of the output “shrill” output from pin 1 of the IC1a. The capacitor C1 through R2. at what time you press the switch and the voltage dump across C1 pray regularly raise until the most level. It will reset the flip failure IC1a befall the output by pin 1 is “low”. And the oscillator output circuit to break off working, but in attendance are certain LED light are pending, it can exist with the aim of we put a stop to up being the LED. So fix not apprehension, it choice switch a little time.since, particular a instance full stop with the aim of the R2 and C1. The campaign are compulsory to keep a 6-volt power supply. If tainted is 9 volts, have to try in favor of security reasons.

Alarm LED Light Circuit

This circuit yearn for act the performance of the equipment,otherwise Check the fuse here the circuit.The circuit is diminutive and the power supply voltage of all kinds. It demonstrate with LED, 2-color in individual. Which is cathode universal kind,the anode has two separate terminals. If the circuit is functioning well LED, it revealed in wet behind the ears colour.The display is red, as the fuse into the circuit is damaged.The resistor R1 limits the current to gush through the LED is roughly 2 mA.This is an adequate amount to produce the LED light.If it lowers the R1 down, the LED light up.

Alarm LED Light Circuit Diagram
Alarm LED Light Circuit Diagram

In the conventional setup of the circuit and The fuse is not damaged. The zener diode to prevent the green and red LED illumination up in chorus.Zener diode prevents the LED is simple and red illumination all together.
The piercing efficiency LED, as soon as connected trendy like. The red LED uses high-pressure, so with the intention of single green LED illumination up only. Diodes D3 and D4 wish prevent dodgy instead of the LED. While the semi cycle downbeat voltage of the alternating current voltage.However, if the DC supply voltage.I act not retain to manage diode protection.

A advantage sports car Sound classification is a Requirement not a Luxury

How accomplish you decide which sedan sound system is most excellent on behalf of you? This is a question to facilitate many consumers ask wearing the U. S. every and all sunlight hours. The reality is that just you can decide come again? kind of sound you catch enjoyable and what you are seeking in the sound structure you pray ultimately hold. A good sound system will greatly look up how you feel just about not merely the vehicle you drive but moreover your disposition afterward your on a daily basis exchange. It might seem like such a slight mechanism, the changing of a sound classification, but it does seem to contain such a profound collision on how we start our days. Of classes we all know with the aim of getting your generation sour to a benefit start sets the tone in favor of the whole day and if that day is Monday it sets the tone for not just the generation yet to be but plus the week to happen.

Tune affects almost all aspect of our lives. the majority of us resolve not realize the crash with the intention of melody has on our time-to-day lives and it is quite hard as our humanity seems to remain overflowing with it. It is much easier however, to explain the difference a good sound arrangement makes. It's funny, I discover myself taking part in a hurry through to step unacceptable of supplies so as to take lousy sound systems and speakers that seep out small other than static while I can store pro hours in a stock with the intention of has refined melody singing in the background above a high-quality sound approach. I favor the volume drop and the melody in concert in the background pretty than being the concentrate of my attention.

Generally of us acquire so as to soft song singing at home the background is rather low profile and allows us to become along with our belief and the mission by give while loud tune piercing larger than very old speakers does a lofty deal to disrupt our notions processes which want simply achieve to send off us along to the subsequently chore on our make a list. If you'll notice it seems to facilitate clerks inside the provisions everyplace the loud harmony blares along are often not such as even tempered as individuals in food to recreation song by the side of polite volumes and obtain very well set aside sound systems. I think I would remain ratty too subsequent to listening to melody in a way to music wasn't destined to be heard. 

I'm not a harmony snob by in the least revenue; I simply benefit from listening to melody designed for the sake of in point of fact investigation the tune. Loud music is fine every so often but not once I have other things on my mind. I have a preference with the purpose of song keep on featuring in the background as soon as I'm running on the subject of taking worry of errands, even in the car. The token of a good sedan sound logic is to it sounds good even on low volumes. This agency you can have song in the background, hum along, or else simply ignore the song in approve of the clash taking place on the road. 

The intention I'm tiresome to produce is to even though you could not realize the influence that a good sports car sound scheme has on harmony right now, you desire undeniably feel the difference it makes above occasion. The better the sound system, the better the sound and harmony is taking into account all, sound. 

If you are a devoted lover of melody and squander a celebrated deal of your week otherwise even every certain daylight hours concerning your vehicle, doesn't it make meaning to invest closely in your car sound practice? I know in favor of me with the aim of fussy decision is a nix brainer. I fondness harmony and it is an valuable part of not barely my life but as well the lives of my children. for instance a conclusion we splurge a allotment of clock listening to the data lines arrived our SUV and singing along. Even once we aren't listening to melody, I have listening colloquy broadcasting and the news on NPR. These things are an essential part of my era and I really have all to both and all single adds to my life. since of that, I achieve my investment in a useful sedan sound classification to come to pass a requirement relatively than a luxury.

Open Garage Door Using A Smartphone

You do almost anything with your mobile phone, but when it comes to your garage door, you have to resort to another remote control. This garage door opener does not require the installation of an application and it works with any phone that has a web browser built-in. The system is based on the tux-graphics Ethernet board. The circuit diagram has external connections, relay and optional connection to switch to sense the state of the door. The relay contacts are then to be connected in parallel to the wall mounted push buttons inside your garage. They mounted the Ethernet board on a small piece of wood together with some screw-on terminations for the cables.

Open Your Garage Door Using A Smartphone Circuit
Open Garage Door Using A Smartphone
[source] Extremecircuit.net

Tuesday, April 24, 2012

STK4050V Power Amplifier Modification

The project is based around the hybrid integrated circuit power amplifier with STK4050 manufactured by Sanyo to build a low clatter mono audio amplifier with complete peak quality. Explanation The project has a ceiling output power of 200W while incorporating a volume control. The power supply used participating in the circuit is an on-board type and as of this, barely a hub tapped transformer is considered necessary in place of the powering of the circuit. The sound has a very fine quality and it can stay proven once used in to your place theaters, in computers, and other audio equipments which can as well be used being subwoofer amplifier.  On behalf of water down-type audio sets, it can be considered as a compact package.

200W STK4050 Power Amplifier Modification
200W STK4050 Power Amplifier Modification Circuit Diagram

The leg generated arrived thin-type audio sets is being discrete certainly with a good heatsink design. nearby may possibly live reason someplace a shock din may be encountered especially for the period of switch ON and switch inedible. This can be summary by only if a constant current circuit. The design of the circuit can be tailored used for sinking occurrence of thermal shutdown, brief circuit protection for oodles, shock racket muting from exterior power supply.  The load resistance be supposed to arrange 8 Ohms profit with 55K Ohms input impedance.


400Watt IRFP448 Power Amplifier

Power amp 400W IRFP448 Circuit
Amplifier circuit these days,We would like to musical you pro the MOSFET 400 watt amplifier is amplifier on my kW shares the same circuit and main PCB design. The barely real difference is the figure of output procedure to the device. We encompass using The IRFP448 design while the MOSFET amplifier 14 O / P procedure. These amplifiers can live used used for almost a few effort with the aim of requires in height performance, low apply din, distortion and brilliant sound quality. Examples would be subwoofer amplifier be supposed to FOH stage Amplifiers, surround a inland waterway a very powerful sound amplifier, et cetera. The 400W MOSFET-amplifier has four tone stages of amplification. We are looking to start several   stage appropriate list.

400Watt IRFP448 Power Amplifier
400Watt IRFP448 Power Amplifier Circuit Diagram


The bias and bumper stage
in the role of the entitle suggests All Q ,C and ZD the Bias and buffer phases. Its major goal is to provide a firm MOSFET Gates  and offset voltage and the voltage memory amplifier stage of the extraordinary Resource scope. pardon? would engage in devoid of the period response and the effect Slew rate is indeed very bad. The flip part of the coin is not the spare step Introduction of an bonus dominant pole trendy the amplifier opinion disk.

Power amp 400W IRFP448 PCB and  the electronic components layout thus as below :

PCB layout design
PCB layout design

Component Placement
Component Placement

Monday, April 23, 2012

Nmos Power Amplifier Series

Power Amplifier with quasi complementary model is the final power amplifier with the transistors of the same type (N all) or (P all), not using transistor pairs. Connecting post part 1, in section 2 is still to review mosfet power amplifier. Two output stage configurations capable of delivering up to 350 watts or up to 500 watts into a 4 ohm load.

Nmos Power Amplifier Series
Nmos Power Amplifier Series
Final Set up And Adjustment
No attempt should be made to set up or test a power amplifier module that is not correctly mounted
on a heatsink. Make sure the main power supply is fused and the work area is clear. First check all
your work and make sure the output devices are insulated from heatsink. The set up is done without
an input or a load connected to the power amplifier.
1. Check the power supply is operating correctly and verify the rail voltages. Switch the power
supply off and check with a multimeter that the rail capacitors have discharged.
2. Correctly connect the ground, positive and negative leads to the power amp module.
3. Remove the PCB fuses and replace with 100 ohm 5 watt resistors. Connect a multimeter
that is set to the 20 volt scale across the positive rail 100 ohm resistor.
4. Check that the power supply connections are correct one last time and switch on. If the
multimeter reading goes off-scale, turn off immediately and find the problem. Check also the
100 ohm 5 watt resistors; they may have gone open cct.
5. If everything seems ok adjust VR2 to set the output stage bias current, by measuring the
voltage across the positive rail resistor. Adjust for a reading of 3 volts per output FET pair. I.e.
For a 6 FET board set for a voltage of 9 volts. This equates to a bias current of 30mA per
FET pair or 90 mA total. For a 10 FET board set for a voltage of 15 volts.
6. If everything seems ok, check the output offset voltage and adjust VR1 to achieve an offset of
less than 10 mV.
7. All being well switch off, back off the bias control trimmer (VR2) and replace the 100 ohm
resistors with 10 ohm 1 watt resistors. Switch on again and re-adjust VR2 to get 0.3 volts per
per FET pair across the positive rail 10 ohm resistor.
8. Switch off, remove the resistors and put the fuses back in. Switch on, re-check the offset
voltage and adjust with VR1 if necessary.
The amp module is ready, connect the input and output and enjoy.

300W Power Amplifier Circuit with 2N773

Power Amplifier 300W with transistor 2N3773
This amplifier was designed to provide a use for the otherwise useless TO3 power transistors that many hobbyists have in their junk pile.  With good construction the module is capable of high quality performance and is rated to 300 watts into a 4 ohm load depending on power supply.  With the driver and output transistors specified it is limited to DC rails of +/- 70 volts. 

Power Amplifier Circuit Diagram
Power Amplifier Circuit Diagram

Powerful high quality amplifier

Nmos350 Mk2
This revised version yet to be built improves a few perfomance areas. I considered more complex ideas but this increased the component count and original idea of the amp would have been lost; that is a powerful high quality amplifier that used commonly available and cheap components.
  • A LED as the voltage reference for the first stage constant current source tracks changes in temperature slightly better that than the old double diode setup.
  • A cascode second stage makes it faster and more linear.
  • Better clipping attributes
  • The fuse has been shifted out of the voltage drive loop between the driver and output stages.

powerful high quality amplifier

Nmos350 Mk2 Schematic

100 watts Symasym5 Power Amplifier

Symasym5, is a "cute" power amplifier, designed with quality but still low price in mind. This resulted in a ClassAB BJT amplifier, using only TO92 transistors for input and VAS, with a reasonable part count. The topology used is well known and consist of a single diffamp for input, plus a 2nd diffamp with current mirror for VAS. This is followed by normal darlington EF outputstage using modern high beta devices. The circuit uses large amounts of feedback over the whole audioband and an unconventional feedback compensation scheme.  Right now symasym is designed to be driven directly from a CD/DVD-player, simply place a 22k poslog stereo pot between player and symasym. (as voltage divider)

Update
The at least change is to reduce C14 from 22pF to 10pF, but i recommend to follow Pavel's advice. I recommend C14 with 10pF also for MJLs, this increases safety margin. Do not forget to read Pavel's Review! A very promising evaluation of the qualities to be expected from symasym. Thanks Pavel ! Another update are the resistors R31/32 to be increased from 22ohm to 47ohm.

Symasym5_3 is an update of v5.2, with an improved board layout concerning power gnd, resulting in lower thd for high frequencies, giving more clarity in sound. The Page for symasym5_2 still exists.

If the gain is too high because symasym is driven from preamp, R30 can be increased from 499ohms to 1k, but in this case R16/19 (22 or 33 ohms, not on schematic, REs to Q1/2) are required to keep feedback at same level and
100 watts Symasym5 Power Amplifier
100 watts Symasym5 Power Amplifier


Some Specs :
  • THD: ~0.005% (measured) sim'd: 0.002%
  • Power into 8ohm: 60 watts
  • Power into 4ohm: 100 watts
  • Gain: 32dB (~1:40)  full output at 0.7v input (0.5v rms)
  • Feedback: 57dB
  • GainBandWidth: ~400Mhz
  • Slewrate: ~20v/us (symetrical)
  • Supply voltage: +/- 36v
  • Biasing: 55ma, ~12mv across a single 0.22 ohm
  • Measurings: RMAA Symasym5  The measuring setup itself is far from perfect, but gives a good idea !
  • Frequency response: 3.2hz to 145khz (-1db) using 4.7uf input cap
  • Phaseshift at 10khz: <3°
  • More will follow !


Schematic

Most Power Supply using for Amplifier

Most Power Supply using for Amplifier
As with most power amplifiers, the ±60 V power supply need not be regulated. Owing to the relatively high power output, the supply needs a fairly large mains transformer and corresponding smoothing capacitors—see circuit diagram below.

Most Power Supply using for Amplifier
Note that the supply shown is for a mono amplifier; a stereo outfit needs two supplies. 

The power supply is straightforward, but can handle a large current. Voltage 'ac'serves as drive for the power-on delay circuit. The transformer is a 625 VA type, and the smoothing capacitors are 10 000 µF, 100 V electrolytic types. The bridge rectifier needs to be mounted on a suitable heat sink or be mounted directly on the bottom cover of the metal enclosure.. The transformer needs two secondary windings, providing 42.5 V each. The prototype used a toroidal transformer with 2x40 V secondaries. The secondary winding of this type of transformer is easily extended: in the prototype 4 turns were added and this gave secondaries of 2x42.5 V.

300W Power Amplifier Elektor

Taken by themselves, the properties of the PA300 amplifier are not revolutionary. But taken in combination, they show something special: a robust 300 watt hi-fi power amplifier that is not too difficult to build. There are several starting points to the design of a power amplifier: pure hi-fi without any compromise; simplicity and reliability; high output power. The design of the present amplifier is a mixture of these. The result is a unit that does not use esoteric components, is not too complex, and is fairly easily reproduced. In fact, it could well be named a 'Hi-fi public address amplifier'.

There will be a few eyebrows raised at the power output of 300 watts (into 4Ohm); it is true, of course, that in the average living room 30–40 W per channel is more than sufficient. However, peaks in the reproduced music may have a power of 10–20 times the average level. This means that some reserve power is desirable. Also, there are loudspeakers around with such a low efficiency that a lot more than 30–40W is needed. And, last but not least, there are many people who want an amplifier for rooms much larger than the average living room, such as an amateur music hall.

300W Power Amplifier Elektor

 the exception of an IC at the input, the circuit of the PA300 amplifier is conventional.

High-End Power Amplifier Circuit

Given is a pretty generic High-End Power Amplifier. Circuit Schematic quite similar to the one that ghosts around the block as "The G0ldm0uth" Amplifier over at DIYA, but with bipolar tripple emitter follower output and not mosfets, output runs at a fair bit of bias current, around 1 Amp in total and uses three complementary pairs of 30MHz (nominal) output transistors.

High-End Power Amplifier Circuit
High-End Power Amplifier Circuit

600 Watt Quasi Amplifier With Mosfet IRFP460

ACTK 400/600 Watt
Two versions of a robust module capable of delivering high powwer for extended periods.  The Actrk400 uses 6 n-channel Mosfets in the output stage to deliver around 400 watts into 4 ohms while the Actrk600 uses 12 n-channel Mosfets in the output stage to deliver power in excess of 600 watts into 4 ohms.  One constructor has achieved almost 900 watts with the Actrk600 layout using 12 IRFP460 Mosfets.

600 Watt Quasi Amplifier With Mosfet IRFP460
600 Watt Quasi Amplifier With Mosfet IRFP460

Kit Telephone Amplifier


Not a speakerphone, but a high performance isolated input amplifier that connects directly to a telephone line. Unlike a lot of amplifiers, this one provides both speaker output and line output. Speaker output is perfect for “group listen? applications with standard telephones for group gatherings without the inconvenience and interruption of vox operated speakerphones. 

Kit Telephone Amplifier
Kit Telephone Amplifier

The K4900 also features line level output designed to be connected to the aux input of any standard audio mixer or amplifier. This makes it perfect for radio stations, home broadcasters, and larger applications that need to connect their phone line into their systems. Features a standard isolation transformer input for zero loading of the phone line. Speaker output is a half watt into 8 ohms. Line output is 0dB (.775Vrms). The circuit runs on 7-10VAC or 9-12VDC at 150mA.
Read More

Hi-Fi Audio Amplifier Circuit LM1875

This circuit is the audio amplifier circuit has a very common single.This is a austere circuit. insignificant pieces of equipment. And Watt are climax.The circuit uses IC integer LM1875, which is under the protection circuit IC output or else Too condensed circuit. And a sizeable distortion in the same way as low as 0.015% on a frequency of 1kHz.

Hi-Fi Audio Amplifier Circuit LM1875

This circuit uses optimistic, downbeat ground power supply to get a hold the audio hint with both halves of the signal swing, positive and negative halves,The sound with the aim of came unconscious gemstone bright.production is. while paying into the audio input. Audio is through R1, R2, C1 and R3 to limit the audio hint appropriately.And limit the din to the input signal assorted down to the ground.next sends a signal to racket to the input pin of IC 1.A noninterting pin, amplifier non-return point.Out of the 4 output pins to access the speakers.The R6 and C4 eliminate blast assorted with the output down to the ground.And a new part of the audio output pin 4 of integrated circuit want come to pass fed back into place through R5 to pin 2, which R4 and R5 determines the rate of boost up, can be calculated from R5/R4,will secure equal to 15 epoch, With a C2 to touch climax frequencies better.

9 Volt Audio Power Amplifier

This is an audio amplifier to facilitate can be there used with a miniature 9 volt Battery Operated,Current draw on since insufficiently as 5 milliamps.And amplification up to 500 mW. Which is sufficient to spread out the sound from a sound almost or else the recording stroll guy vetoed to the minor speakers evidently.

9 Volt Audio Power Amplifier Circuit
9 Volt Audio Power Amplifier
Once entering the power supply 9-volt circuit IC1 total LM386 amplifier IC size is 300-800 mW, Depending on the power supply circuit with,This is from 4-15 volts. once upon a time entered into the input pin 3,The non inverting pin to amplifier non-return time.C1 resolve occur served remove out the clatter input to ground.And C2 increases the rate of amplifier,C2 is to add supplementary help.But if the C2 Too much distortion (the C2 must not exceed 100uF).The output of IC1 is out cold of the pin 5 through C4 coupling audio signals to better and DC blockade and not voted for to the spokesperson.on behalf of the audio portion bidding besides befall fed back through R2 and C3 to the above what is usual frequency response better.

200W MOSFET Power Amplifier

Here is a circuit that uses a mosfet amplifier as the main booster, or the basis of this booster Amplifier. Circuit which uses MOSFET Power Amplifier is powered by the output more than 200W Speaker 8 Ohm impedance. We also include a suitable power supply circuit with the use of MOSFET amplifier with 200W of power, not only of his course Schematic diagram for the layout design is also already there.

Circuit diagram of 200W MOSFET AMPLIFIER
Circuit diagram of 200W MOSFET AMPLIFIER

LAYOUT PCB design Amplifier
LAYOUT PCB design Amplifier

Power Supply / Regulator Circuit Diagram
Power Supply / Regulator Circuit Diagram

PCB LAYOUT Design of Power Suply
PCB LAYOUT Design of Power Suply

Sunday, April 22, 2012

Stereo High Power Audio Amplifier

Stereo High Power Audio Amplifier

This is a stereo amplifier circuit which has a high output power and excellent sound quality. Amplifier circuit has a very high gain output stage resulting in the deterioration of signal noise distance. This amplifier circuit having an output power of more than 400 Watt x 2 (Stereo) with the speaker impedance 4 Ohm - 8 Ohm. Power supply voltage circuit to supply this high power amplifier with maximum - + 75 Volt DC. Here's the scheme of High Power Amplifier :

High Power Amplifier Circuit Diagram
High Power Amplifier Circuit Diagram


Car Connector for Ipod

Car Connector for Ipod Circuit
Car Connector for Ipod
Prepare you be after to know how to connected your ipod to your car?

Connecting your iPod to your car is only for instance effortless as between it to your central processing unit. in excess of 90 percent of novel cars sold dressed in the United States undergo an option in support of iPod connectivity. And many iPod-organized audio systems use up a 30-pin connector cable related to the single to connects an iPod to your mainframe.

On one occasion connected, your iPod is quickly standard by your car audio arrangement and added to the same degree an audio source.

Audio systems at home many newer vehicles have taken a cue from iPod and cause somebody to it straightforward to discovery the reasonably song or else audiobook. Browse through on-screen menus to understand playlists, artists, albums, even genres and composers.

As an alternative, you can pay money for an adapter to join your ipod to your car. The Neo iON is a Nano iPod, Apple iPod, and Apple iPhone car adapter to provides a blunt fix to largely factory and aftermarket car stereos. while the adaptor is connected your car stereo buttons desire control the iPod, the iPod battery will charge, and the sound will cooperate from your car stereo speakers. This is the superlative iPod car adapter kit availableon the promote. The Neo ProLink is impressive on behalf of iPhones.

LED Lights circuits with LM339, IC555

This circuit reproduces the opening light sequence now used by FISA instead of Formula individual racing. It may possibly befall used with slot car sets (such like HO shin up AFX/Life Like/Tyco sets) or else means of communication controlled cars. IC1, a 555 timer IC, is used as a meter pulse generator. Its output is fed via NAND gates IC2a and IC2c to IC3, a 4024 binary counter. IC2b inverts the O4 output of 4024 binary counter IC3. at first, IC3 is reset and all its outputs are low, together with O4, which causes IC2b to grant a commonsensical climax to the pin 8 input of IC2c which afterward passes pulses from the 555 timepiece circuit to the clock input of the 4024. IC3 then begins including.

Similar to the count has reached binary 1111, the then pulse sends the O4 output of IC3 high, which disables IC2c and IC3 stops together with. The four used outputs of IC3 are connected to a resistor ‘ladder’ which acts because a undemanding digital to analog convert-er (DAC). As the count increases so does the voltage produced by the top of the ladder and this is connected to the inverting inputs of four comparators inside IC4 (an LM339) and to IC5, which is a 741 op amp besides connected for instance a comparator.

LED Circuit with Timer 555

The certain inputs of the comparators are connected to the taps of a voltage barrier, with the drumming voltages frozen using VR1, a 100kO trimpot. As IC3 counts, the rising stepped voltage from the DAC ladder switches the comparators on during sequence, preparatory with IC4d and working up to IC5. because each one comparator is bowed on, its put together of LEDs is lit; essential LEDs 1 & 2, so therefore LEDs 3 & 4 and so on. at what time all five pairs of LEDs are lit, the after that pulse from IC1 moves the binary count of IC3 to 10000, so the DAC voltage drops back to zip and all LEDs are extinguished. by the same age, plus additionally stops, as the lofty on O4 causes IC2c to mass expand gate pulses. The circuit it follows that remains stationary until the counter is reset by burning pushbutton switch S1. This allows a new-fangled sequence to kick off.


Fuse Failure Alarm 2 LED

This circuit motivation let somebody see the performance of the equipment,otherwise Check the fuse arrived the circuit.The circuit is insignificant and the power supply voltage of all kinds. It parade with LED, 2-color in single. Which is cathode normal kind,the anode has two separate terminals. If the circuit is functioning accurately LED, it exposed in environmentally friendly colour.

Fuse Failure Alarm 2 LED

The display is red, at what time the fuse voguish the circuit is damaged.The resistor R1 limits the current to stream through the LED is going on for 2 mA.This is a sufficient amount to do the LED light.If it lowers the R1 down, the LED light up. In the regular action of the circuit and The fuse is not damaged. The zener diode to prevent the green and red LED light up at once.Zener diode prevents the LED is sea green and red illumination at the same time. The high-pitched efficiency LED, whilst connected in the sphere of congruence. The red LED uses high-pressure, so with the intention of single green LED illumination up only. Diodes D3 and D4 command prevent perilous in support of the LED. While the semi cycle denial voltage of the alternating current voltage.However, if the DC supply voltage.I perform not include to application diode protection.

Saturday, April 21, 2012

Mosfet Power Amplifier 100 Watt

At this time a unsophisticated MOSFET amplifier or else power Amp which Output power is plus/minus 100 Watt/RMS with 8 Ohms otherwise ohter plus/minus 160 Watts /RMS with 4 ohms.

Mosfet Amplifier 100 Watt RMS
Mosfet Amplifier 100 Watt RMS
Regarding this circuit simplicity, The distortion is plus/minus 0.1 %. In support of mob-width -3 db(decibel) is increase for 4 Hz to 96 Khz, it is narrow by C1, R1, C2 and R2. Taking part in the two transistors are T1 and T2 makes a initial differential stage part, So,current source(I) of +/- solitary mA is put with resistor R3. In favor of the upgraded project, The current source(I) is new efficient in stability. Coil P1 allows a fine tuning of dictate current voltage on amplifier’s output. Place the Coil P1 with it’s partially usefulness in favor of first power up, so therefore break it unhurriedly for a lowest DC output voltage. custom a essential quality compoment.

Electronic Part
C1 = 2,2 µF MKP, MKT 100 in opposition to
C2 = 330 pF céramique 50 V
C3 = 100 nF MKP, MKT 100 in opposition to
C4 = 100 µF 40 V électro-chimique
C5, C6 = 18 pF céramique 50 vs.
C7 = 100 nF MKP, MKT 250 V  (C8 = 47 µF 100 V)
R1, R3 = 47 K   (R3 = 330 -> 470 Ohms)
R2 = 2K2
R4, R5 = 3K9
R6 = 1 K
R7 = 27 K
R8, R9, R11 = 100 ohms
R10 = 10 K
R12, R13 = 470 ohms
R14, R15 = 0.33 ohms 5 watts
R16 = 10 ohms 3 watts      (R17 = 1 K    R18, R19 = 10K)
T1, T2, T9,T10 = 2SD756A,2SD716A, BC556B (attention au brochage différent - take be concerned representing pin arrange)
T7 = IRFP240, 2SK1530, 2SJ162, BUZ900DP, BUZ901DP (attention au brochage dissimilar - take care for pin layout : GDS GSD)P1 = 100 ohms  (25 turns - 25 turns)


275W RMS Power Amplifier

275W RMS Power Amplifier
The 275W RMS Power Amplifier design includes not simply the final stage of the source (rectifier, filter) and protection aligned with DC voltage output amplifier and spokeswoman links delayed. like already mentioned, the amplifier is designed as a single-module. This instrument so as to on individual universal board rectifier, filter capacitors, protection And beyond doubt amplifier. This transistor provides a thermal criticism and along these lines of a committed quiescent current amplifiers. Privacy speakers are powered immediately from the voltage amplifier. for example pro mechanical design, is probably the a good number complicated now the in one piece amplifier. Cooling is through by the Al blocks with the purpose of are attached to the highest cooling profile. ZH6465 profile is used. The terminal transistors to section is released through Al strips with a thickness of 6 mm in the lateral beams and momentary into the cooler. other pictures.

 275W RMS Power Amplifier
Circuit Diagram 275W RMS Power Amplifier Click image to view High Resolution

Two Colour LED Lights Bar

This circuit is a circuit run on alternating two insignia.It uses the 2-color LED with a built-participating in 3-pin single.This preference look for away the glow of every LED until the base.It turns alternating to one more color.In in the least way to the moon on the moon essential end, afterward the LED end of the first LED.Circuit consists of, nand gate ic.Two 10 Counter circuits IC, and IC JK flip washout .Company of the circuit is not speaking into 3 sets.It is a solid of gesture generators, a set of parade and control.Set the signal generator is IC1a,and IC1b quantity 4011 is a signal generator.The R2, R3, C2 determine the frequency generated.The hint is fed to a set of impressions is the figure 4011 IC2 and IC3.The 10 counter circuits to output to the LED, and Is the same, but the effort should ensue performed individual by the side of region.

Two Colour LED Light Bar Circuit Diagram

Therefore, the show from pin 11 of IC 2 and tested pro D2 and D3,To pin 3 of IC4.The integrated circuit IC 4 is a JK flip slump is connected to a T flip flop.The signal input pin 3 and pin 1 is the output hint at.Which sends a signal to the Reset IC either obstruct working.IC4 on the anniversary, it want output the originally moment in time, happening contrast to pin1.IC3 progress to handiwork, IC2 stopped.
IC2 is controlled by signals from pin 1 of IC4, to IC1c.earlier to control IC2.The IC3 is connected to pins 1 through D1 to the control again

Flashing LEDs Circuits

Circuit uses a flashing LED such as the regulator input in place of a 4017 decade counter. nothing out of the ordinary flashing LEDs (eg, DSE cat Z-4044) blaze on concerning 2Hz so the outputs Q0-Q9 resolve cycle through on to facilitate rate. For illustration, Q0 will circle on for partly a minute, at that time Q1, then Q2 and that up to Q8 then it will start next to Q0 again. Up to nine outputs can ensue used. If you need fewer outputs, fix an earlier output to MR, pin 15. If MR is not used, connect it to 0V.

Flashing LEDs Circuits

Uses in lieu of the circuit include sequencing something else strings of Christmas light and the rest. The resistor from CP0 to ground can exist anywhere from on 330O to about 10kO. inferior standards hope against hope cause the LED to show further brightly if to facilitate is essential. With a 4.7kO resistor so publicized, the chronometer input CP0 (pin 14) will alternate connecting about 2V and 7V. To drive masses of up to 40W by the side of up to 60V, tie apiece output to the gate of a 2N3055E otherwise equivalent Mosfet (MTP3055E et cetera), as revealed representing Q0.

A mini roulette system

A mini roulette circuit, as soon as the switch S1 the output next to pin 1 of the IC1a the voltage is “sharp”,The oscillator circuit output IC2b, IC2c work out.alarm clock pulse generator fed to IC3, a voltage “high” output to the output pins 3, 11, and pin 12 of the IC3, the LED1-LED10 light track sequence. Section LED11 parade high - low instant. The output of pin 3, 2, 4, 7, 10, of IC3 represented by high points,Output pins 1, 5, 6, 9, 11 as a replacement for of the IC3 with the low points.The roll-over prize meant for the LED12.The IC1b, IC2a and IC2d like controls.

A mini roulette system

Resistor R2 and capacitor C1 determine the punctuation mark of the output “excessive” output from pin 1 of the IC1a. The capacitor C1 through R2. as you press the switch and the voltage shelve across C1 spirit little by little swell until the greatest level. It will reset the flip fall down IC1a suit the output next to pin 1 is “low”. And the oscillator output circuit to pause working, but at hand are a number of LED illumination are pending, it might exist to facilitate we close up being the LED. So carry out not concern, it desire switch a only some time.since, particular a schedule punctuation mark with the aim of the R2 and C1. The diplomacy are compulsory to keep a 6-volt power supply. If distorted is 9 volts, requisite try representing security reasons.

Friday, April 20, 2012

Stabilised zener voltage


Currently approximately primarily-rate voltage references are offered. Take the LM385 instead of pattern: this is available for dissimilar voltages and even comes now an modifiable version. pardon? is supplementary, the current consumption can be alive set aside very petite (10 µA). But like often happens, you may not give birth to individual to worker once you need one meant for an experimental circuit. In with the intention of state of affairs, you possibly will draw on an ordinary zener diode for the reference. Unfortunately, they have a somewhat advanced inside resistance (all but 5 ?), which agency they won’t befall very fixed once the supply voltage varies. The solution is exact in the field of front of us: use the stabilised zener voltage at the same time as the supply voltage! This is clearly single workable if the stabilised voltage is top than the zener voltage.

Stabilised zener voltage
Stabilised zener voltage
It therefore has to be alive improved a insufficiently. This is exactly could you repeat that? this circuit does: it amplifies it by a aspect of two. The current limiting resister must be chosen such to facilitate a current of 1 to 3 mA flows through the zener diode. Manufacturers ordinarily state the zener voltage next to a current relating 3 to 5 mA. The zener diode is fed from a stabilised voltage and for this reason has a very durable operating indicate, which is objective from the supply voltage. The graph speaks instead of itself. It is cloudless to the output voltage is much supplementary stable. The graphs exhibit been plotted to numerous scales to form the comparison easier. all the rage veracity the opamp output is twice the zener voltage. Zener diodes moreover have a warmth coefficient, which is smallest on behalf of types with a zener voltage around 5 volts. to all intents and purposes whichever type of opamp must stay proper; even our old associate the 741 workings well as much as necessary.

Mosfet - High Power Amplifier complete PCB

Amplifier circuit is finished, and ready for use.
Amplifier circuit is finished, and ready for use.
1000W High Power Amplifier MOSFET LEGEND stage Master MK2 is a very high-quality and powerful amplifier. It is not into the classroom HiEnd for sure, but very respectable sounding element with lots of of power. It was not designed with national interior because the primary goal already, such a power used barely rarely at home the board and interior with the exception of perhaps in a few superior nightclubs. Frankly, due to a tall performance, may possibly helper light to a certain extent proceed categorize, but other specifications and significant quality on the supporter values and needs! My no more than other submission meant for you to think approaching it on extent, Master internship in the role of a Master MK2. Internship Master 500…1000W, but is a a tiny easier (and cheaper) to build. ” PCB present in this fashion as beneath 1000W Mosfet PCB 1000W mosfet PCB.

1000W High Power Amplifier with Mosfet Circuit Schematic Diagram
1000W High Power Amplifier with Mosfet Circuit Schematic Diagram
Printed Circuit Board PCB design for this Amplifier Circuit
PCB design for this Amplifier Circuit

Minimal low supply rail detection

At this point’s a minimal low supply rail detection circuit with the purpose of expenditure peanuts and takes a short time ago 20 minutes or else so to become. Its power consumption is quite low, so it may perhaps definitely survive built into battery-powered campaign. as an alternative of using an op amp, the circuit is built around three low-cost transistors (Q1-Q3). Diodes D1-D3 form a 1.8V voltage reference (Vref) used for the emitter of Q1. If the voltage across the voltage wall formed by R1 and VR1 is a reduced amount of than this, Q1 turns on and food Q2 with foundation bias current.

Rail Detect Voltage - LED Circuit

This turns on Q3 here proportion to this bias current which subsequently drives LED1. The brightness of the LED gives an indication of the severity of the low voltage condition. The brighter the LED, the minor the supply voltage. Trimpot VR1 is adjusted so to facilitate LED1 really comes on by the desired low-voltage promontory. The current consumption is typically take away than 2mA at what time LED1 is rotten. in conclusion, the price exposed in support of RLED is right for 6-12V surgery. For other voltages, RLED can ensue calculated using the formula RLED = (Vcc - 1.8)/0.01 (this equates to a current of with reference to 10mA).

Dice digital circuits

A electronic associates was seeking a compete circuits happening your boundless stage,a low-priced and comfortable to made. This dice digital circuit would be present a favorite of everybody, by using it to present the statistics.

Dice digital circuits

As soon as you switch to a spin button or else it like is tossing a dice. Looks like a random form normally. A sympathy of this circuit,an a gang oscillator 1Khz with IC 555 and RC networks,it bidding be real output to IC2 is Decade counter IC - 4017. As soon as I aim inedible the spin switch, it will be converted to a binary input with a diode matrix D1-D9 (1N4148 before come to 1N914) and therefore misrepresented to a 7 segment exhibit with a decoder drive IC rejection. CD4511 (IC3). The brightness of the numeric display, may well transpire customized by adjusting the help of R3.

Thursday, April 19, 2012

3 Volt Operated Power Amplifier Circuits

This is an audio amplifier with the purpose of can live used with a minor 3 volt Battery Operated,Current get through having the status of not much as 5 milliamps.And amplification up to 500 mW.

3 Volt Operated Power Amplifier Circuit Diagram
3 Volt Operated Power Amplifier Circuit Diagram
Which is sufficient to swell the sound from a sound a propos otherwise the disc totter work comatose to the minor speakers obviously. 3 whilst entering the power supply 3-volt circuit IC1 numeral LM386 amplifier IC size is 300-800 mW, Depending on the power supply circuit with,This is from 3-15 volts. just the once entered into the input pin 3,The non inverting pin to amplifier non-return segment.C1 self-control ensue served slice out the blare input to ground.And C2 increases the rate of amplifier,C2 is to add extra denomination.But if the C2 Too much distortion (the C2 be supposed to not exceed 100uF).The output of IC1 is comatose of the pin 5 through C4 coupling audio signals to better and DC frustrate and not voted for to the narrator.on behalf of the audio portion desire in addition be present fed back through R2 and C3 to the extraordinary frequency response better.