Thursday, March 31, 2016

Solar Charger Controller

When connecting a solar panel to a rechargeable battery, it is usually necessary to use a charge controller circuit to prevent the battery from overcharging. Charge control can be performed with a number of different circuit types. Lower power solar systems can use a series analog charge controller. Series regulators control the charging current by interrupting the flow of current from the solar panel to the battery when the battery reaches a preset full voltage. MPPT controllers use an inductor for energy storage and a high frequency switching circuit to transfer the energy to the battery.

Solar Charger Controller Circuit Diagram

This circuit is for a shunt-mode charge controller. In a shunt-mode circuit, the solar panel is permanently connected to the battery via a series diode. When the solar panel charges the battery up to the desired full voltage, the shunt circuit connects a resistive load across the battery to absorb the excess power from the solar panel. The main advantage of shunt-mode solar regulation is the lack of a switching transistor in the power path between the solar panel and battery. Switching transistors are non-perfect devices, they waste a percentage of available solar power as heat. Inefficiency in the shunt-mode controller’s switching transistor does not effect charging efficiency, it only turns on when excess power is purposely being wasted.

 Solar power is routed from the PV panel through the 1N5818 Schottky diode to the battery. When the battery reaches the full setpoint, the output on the lower half of the TLC2272 dual op-amp turns on. This activates the IRFD110 MOSFET transistor and connects the 68 ohm 3W load resistor to the battery. The load across the battery causes the battery voltage to drop, and the comparator circuit turns back off. This oscillation continues while solar power is available. The 300nF capacitor across the op-amp slows the oscillation frequency down to a few hertz. The two 100K resistors in series provide a regulated 4.5V reference point for use as comparator reference points.

The 2N3906 transistor is wired with a zener diode in its base circuit, when the PV voltage is above 12V, the 2N3906 transistor turns on and enables the comparator circuit. The upper half of the TLC2272 op-amp inverts the dump load control signal, this is used to power the high intensity red LED. The LED turns on when the battery reaches the full setpoint. The LED does not waste any useful charging power since it only turns on when the battery is full.

The 78L09 IC provides 9V regulated power to the comparator circuitry. Operational power for this circuit is provided entirely from the PV panel, there is virtually no power taken from the battery at night.

This circuit can be modified for higher amperage by replacing the 1N5818 diode, 68 ohm load resistor and IRFD110 MOSFET with higher power components. If the load resistor is connected directly across the PV panel at noon on a sunny day, the PV output voltage should drop to 12V or less. Higher power PV panels will require a resistor with lower ohms and a higher wattage rating. In cold climates, it may be useful to use the load resistor’s heat to keep the battery warm.

Operation of a high power version of this circuit with a wind generator should be possible, although the author has not tried this. For a 20 amp version of this circuit, the IRFD110 MOSFET should be replaced with an IRFZ44N and the 1N5818 schottky diode should be replaced with a 20L15T. Both of these parts should have large heat sinks. The 68 ohm/3W resistor should be changed to a much larger resistor, An 0.6 ohm/250W resistor would be able to handle 20 amps at 12V.

5A Power Supply 1.2V - 25V Adjustable with LM338K

The core of the power supply circuit is LM338K. The circuit diagram 5A power supply with adjustable output voltage from 1.2 to 25V. Construction circuit is compact, all elements except transformer, the printed circuit. Serial element to the cooling body mounted over the aluminum-angular profile. One side of angular profile, therefore, lies between the printed circuit boards and regulators LM338K, the other side is mounted on cooling the body with one flat surface.
5A Power Supply 1.2V - 25V Adjustable

5A Power Supply 1.2V - 25V Adjustable

The regulator must be electrically isolated from the angular profile for better heat conductivity . Connected with wires, the minimum and facilitated by the buckle on the printed circuit. Potentiometer to change the output voltage can be trimer potentiometer on a printed circuit or potentiometer on the front panel housing, with two wires connected to the printed circuit boards.

pcb 5A Power Supply 1.2V - 25V Adjustable with LM338K

layout 5A Power Supply 1.2V - 25V Adjustable with LM338K

Wednesday, March 30, 2016

Tone Control + Subwoofer Filter

PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwoofer low pass filter of the second order Sallen Key Design. The roll-off point can be adjusted by changing the value of the external capacitor. Pin assignments and application circuits are optimized for easy PCB Layout and cost saving advantages.

tone control subwoofer

CMOS Technology

2-Channel Input
3-Channel Output (Including 1 stereo Output and Subwoofer Output)
Low Total Harmonic Distortion (THD<0.01%, Subwoofer THD<0.2%)
High S/N Ratio (S/N Ratio <-87dB, A-weighting)
Least External Components
Adjustment of Frequency response by changing the value of the external component
Single Power Supply: 3 to 8.5 Volts
Available in 20 pins, DIP or SO Package

2------ R1,R2-------------- --------- 10k / 1% / metal film
2------ C9,C10------------- -------- 4.7nF / 63V / polyester / raster R. 5mm
3------ C1,C7,C8-------- ----------- 47nF / 63V / polyester / raster R. 5mm
1------ C16---------------- --------- 100nF / 63V / polyester / raster R. 5mm
1------ C13----------------- -------- 220nF / 63V / polyester / raster R. 5mm
2------ C3,C4------------- --------- 2.2uF / 50V / polyester / raster R. 5mm
5------ C5,C6,C11,C14,C15--- 3.3uF / 100V / electrolytic / vertical / raster R. 5mm
1------ C12-------------------------- 10uF / 35V / 105C / electrolytic / vertical / raster R. 5mm
1------ C17----------------- --------- 100uF / 16V / 105C / electrolytic / vertical / raster R. 5mm
1------ C2---------------------------- 470uF / 35V / electrolytic / vertical / raster R. 5mm
Integrated Circuits
1------ U1---------------------------- 78L08 / +8V voltage regulator / TO-92
1-------U2---------------------------- PT2350 / stereo tone control, subwoofer low pass filter IC / DIP20
1------ D1---------------------------- 1N4153
1------ J1----------------------------- 2 pole wire connector (terminal block) to pcb / raster r. 5 mm / hight 9.7 mm
1------ P1----------------- ----------- 10k log stereo potentiometer / 6 mm saft
2------ P2,P3------------------------ 100k lin stereo potentiometer / 6 mm saft
5------ J2 to J5---------------------- RCA female to PCB, straight, Hosiden any colour

NOTICE ABOUT J2 to J18 . if you make one stereo input device you need 5 pcs of RCA female as listed in parts list
If you make 2 x 6 input device, you need total quantity of 15 pcs RCA female and also 2 x 6 changeover switch.
Code of J2 to J18 RCA female to PCB, straight, Hosiden, any colour
SW1 2 x 6 changeover High quality DIP rotary switch to PCB 2 x 6, Alcos witch DRS 2-6, 3.2mm saft

Frequency response of tone control unit is flat between 20 Hz … 20 kHz when treble and bass pots are in middle.
Overall gain is approx. 6 dB when treble and bass pots are in middle.
Treble and bass tone control range is approx. 10 dB (50Hz / 4 kHz) with given component values.
Subwoofer cut off frequency can be adjusted by bass potentiometer… with component values as listed above it is as follows : bass pot in minimum (left) -3dB point, 240 Hz / -12dB 450 Hz, bass pot (middle) -3dB point 100 Hz /-12dB 200 Hz, bass pot maximum (right) -3dB point 60 Hz / -12dB 120 Hz.
Distortion was < 0.1 % when input level was < 0.3V rms.
There is no balance adjustment potentiometer in this application, if you need balance, you must add it separately in this device.

80 MHz - 108 MHz FM transmitter circuit

FM transmitter or often called fm transmitter uses 2 transistors in this article uses 2 transistors 2n2222. If the fm transmitter is in use voltage supply of 9 volt battery and use an antenna whose length is less than 12 inches, then this fm transmitter will be within FCC limits.

Signals from the microphone in the fm transmitter is reinforced by Q1, Q2 with carrier frequency generator is determined by the C5 and L1. The frequency of the FM transmitter is in the range 80 MHz - 108 MHz. L1 can be made ​​with as many as 24 e-mail wire wrap and 6 wrap. The following is a picture series for the fm transmitter fm transmitter referred to in article 2 of this transistor.

rangkaian fm transmitter schematics

This fm transmitter antenna is connected to the mid point of the antenna length L1 and preferably between 8-12 inches. FM Transmitter is only used for experiment and learning materials are not to be used for day-to-day, because the use of FM transmitter frequency regulated and protected by law may be understandable.

Sunday, March 27, 2016

Simple Surround power amplifier with IC TDA7053

Simple Surround audio amplifier circuit with IC TDA7053. Perhaps the surround amplifier circuit below is an interesting circuit is made. For, making easy just by using the IC and electrolytic capacitor added 1 , we already can hear the strains of music with sound ( Front Left ,Right and surround Right , Left. In addition to listening to music , this amplifier is also very suitable for gamers who want good sound quality.

Simple Surround audio amplifier

Simple Surround audio amplifier circuit based on the IC TDA7053
Minimum voltage requred 9 volts and maximum of 15 volts. Power Output of each speaker 10 Watt with 4 ohm impedance.

Mono Power Amplifier using A1015, BD140 ,TIP2955

Typically audio amplifier stereo amplifier to a two amplifier. And if a mono amplifier is a single speaker. However this circuit command be present extended to the mono two loudspeaker.This makes it needless impedance of the speaker has altered.

Mono Power Amplifier using A1015, BD140 ,TIP2955 circuit diagram

Mono Power Amplifier - A1015, BD140 ,TIP2955 Circuit Diagram

What time raising the power supply circuit and the audio to input. the audio sign coupling to through the C1 and R1 to increase with the Q1.Which Q1 serves like the Regional Pre amp amplifier to power up to a one point.already conveyance it to Q2.Which Q2 is connected to emitter follower active as a driver amplifier intimate section from the pre amp section provides added power to drive the Q3 perform. and Q3 motivation provide while a Regional Power amp amplifier output to the spokeswoman.The opinion of the audio intimate through the VR1 and R2 to enter the pin B of Q2.To control the stability of working instead of well brought-up.This circuit is an output of 40 milliwatts watts of distortion of the gesture rate is by the side of 0.1 percent.And frequency response from 15 Hz - 200 kHz.

TA8210AH Car Audio Power Amplifier

TA8210AH 200W car amplifier schematic
IC TA8210AH  using this IC you can apply a circuit of audio power amplifier for the car audio system. In general, all the speakers in the car using a subwoofer speaker, and woofer. Because the car is not big room so the sound is being required is not too high.

This simple car Audio amplifier circuit can work at a minimum voltage 12-volt DC, if supplied under voltage 12-volt amplifier work will be less than the maximum. This amplifier output power up to 200W or 2 x 100W stereo with 8 ohm impedance.

200W car amplifier schematic

Part List TA8210AH Car Audio Power Amplifier :

R1 =1K
R2 =50K trim
R3 =1K
R4 =50K trim
R5 =680R
R6 =680R
R7 =150K
R8 =2R2
R9 =2R2

C1 =1uF
C2 =1uF
C3 =47uF
C4 =47uF
C5 =100n/400V
C6 =220uF
C7 =220uF
C8 =100n/400V
C9 =100n/400V

Intregated Circuit

X2-3=in R
X2-1=in L
X1-1,X1-2=Out R
X1-3,X1-4=Out L

TDA2030 Power Amplifier Complete Tone Control

At this time I present a circuit of power amplifiers that use IC TDA2030, but this circuit is equipped with a tone control. Tone controls include Bass, Treble, and Volume. Power amplifier and tone control has been put together in a single PCB.

TDA2030 complete tone control

As well as its power supply circuit was also used as one with the power amp, and tone control. Making it easier in the installation and will look neat.

TDA2030 complete tone control Circuit Diagram
TDA2030 complete tone control Circuit Diagram
Layout PCB TDA2030 complete tone control
Layout PCB TDA2030 complete tone control

PCB design TDA2030 complete tone control
PCB design TDA2030 complete tone control

This amplifier is a mono amplifier type, can be modified for guitar amplifiers. If not coupled amplifier (mic preamp) then you must deactivated potensio treble and bass, why? because if not using a mic preamp and still maintain potensio treble and bass sound input (input) from the guitar will not or the maximum discharge is not tight on the speakers. So you must deactivated a way to decide which directly connected capacitor with the tone control circuit, and capacitor were connected directly to potensio volume and input jack.

Friday, March 25, 2016

Stereo tone control with loudness and filter

Stereo Tone control circuit is used to adjust the tones before entering the audio power amplifier. Stereo Tone control over equipped with a loudness and filter directly without using the switch to disconnected or connected. Part of his filter that is C1 and R1 from ground to input , and for his loudness on the R4 and C3 are connected to the input and then go to VR1. C2 and R3 go from ground to the input . After the input is set by volume or VR1 then procesed again by treebel ie C8 , R13 , R14 , and VR2 . Bass on R10 , R11, R12 , C7 ,C8 , and VR3. For supply voltages has been given a stabilization in Q3. See circuit diagram schematic below :

stereo tone control with filter

tone control super bass
Stereo tone control with loudness and filter circuit diagram
Part list :
R1 = 100K
R2 = 50K trim
R3 = 22K
R4 = 15K
R5 = 1K
R6 = 4K7
R7 = 330K
R8 = 330K
R9 = 3K3
R10= 5K6
R11= 8K2
R12= 5K6
R13= 1K
R14= 1K
R15= 50K TRIM
R16= 50K TRIM
R17= 330K
R18= 4K7
R19= 47K
R20= 1K
R21= 4K7
R22= 2K2
R23= 100R
R24= 22K
C1 = 15n
C2 = 15n
C3 = 560p
C4 = 4u7
C5 = 33u
C6 = 4n7
C7 = 39n
C8 = 39n
C9 = 4u7
Q1 = C1815
Q2 = C828
D1 = Green Led
This tone control is suitable with 150W OCL power amplifier type 036.But the schematic is mono, if you need a stereo tone control you must duplicate the components  and  circuit.

stereo tone control
Installation the stereo tone control

Car Amplifier with IC LA4445

This circuit using IC LA4445 , this is stereo amplifier with power output 2 X 18 Watt, with this circuit you can use to car amplifier or to other elctronics device. Speaker use woofer with impedance 4 Ohm with power up to 20 Watt. Minimum voltagte require 10 Volt and maximum voltage 18 volt.
see schematic below :

If you can't operate the circuit , please check IC , and then voltage in. If voltage is good check the component are. If components are working . Please check speakers.

Fish caller electronics

For those of you who like fishing, this Fish caller electronics circuit is very suitable for you implement, because it can call the fish and collect a lot of fish so it is easy to provocation and get a lot of fish. Vibrations are excluded from this circuit reaches a distance of several meters in a circle. You can use the river, of where many fish that are easy to find except at sea the waves are fast , so this circuit will not work because it lost by the waves of the sea .Actually , can also be used at sea was calm but the water should not be too choppy.

Fish caller electronics circuit
Part List:
C1   = 10nF
C2   = 47uF/16V
VR1= 5K
R2   = 470R
S1    = Switch On/off
Q1   = BC160
T1   = Transformator Output (OT)
G1  = 3V battery

How to use  the Fish caller circuit :
Ater the circuit is finished and sounds biased, then put inside the bottle and sealed for later when inserted in the water is not damged. After the circuit was put into bottles and then put into water, wait several seconds after the switch on/off button. After this circuit work the fish will come and surround this tool. And when it's like that then it's time to fishing.

Echo effect with IC PT2399 & 4558

Echo Effect is an electronic circuit that is used to delay sound or make an echo in an audio circuit . Using a circuit of echo is easy enough , we just set on the volume, and gain and trimpot near is rate of 20 K ohm to adjust how the desired echoes. This echo circuit using ic 4558D for additional amplifier and ic PT2399 as a based component that serves to echo , or repeat the sound output on the audio system.
echo repeater schematic
Echo effect with IC PT2399 & 4558 Circuit Diagram
How to use it as follows :
That is initially given the output of the mic input or other equipment. Then turn down the volume, and slowly raised, setting echo effect on the trimpot 20K. If not check back for the damaged to the circuit.

Thursday, March 24, 2016

Power supply suitable for high power amplifier

The Power supply circuit suitable with high power amplifier is well designed for large power amplifier circuit and amplifier circuit also requires protection quickly enough so as not to damage because of the power supply is less than the maximum performance or because of a short-circuit on a series of power supply and amplifier. Power supply circuit suitable with high power amplifier is equipped with a fuse, with earth protective chassis. So save on the amplifier and voltage shock to the chassis. In addition to the Power supply circuit suitable with high power amplifier the hum of voices issued almost non-existent because of the high frequency transformer has been issued because of grounded disappeared.
power supply for high power amplifier
 In a multichannel amplifier, power supply will fell into one of three types. In order rising costs, and expected decreases the interaction between the channels, namely:

1. Transformer, rectifiers, and reservoir capacitors are shared between channels.

2. Each channel has its own transformer secondary, rectifiers, and reservoirs. There is one
transformer core and primary, but only together.

3. Each channel has its own transformer, rectifiers, and reservoirs. Nothing except perhaps that electricity and electrical switch split.

Stereo to surround sound systems

Circuit quad amplifier or stereo to surround sound systems using the ic tda7375 to power of 7 watts per channel amplifier version quad or dual 15-watt version (stereo). reaching up to 35 watts in mono version.

stereo to surround sound systems

The TDA7375 is an integrated circuit quad amplifier class AB audio amplifier capable of working in double bridge or quad amplifiers simple integrated circuit protection system for short, requires minimal external components, available in packages multiwatt 15H (TDA7375H) and multiwatt 15V (TDA7375V). While the first design was for automotive applications, you can use it in a variety of low power applications. This integrated circuit is in an ideal situation where one wishes a reasonable power and a relatively low supply voltage for its operation. This circuit drawn below uses the basic configuration of amplifier quad configuration but using a bridge (Bridge), can be about 4 times the maximum power. In this configuration quad amplifier can be used as an amplifier end of surround sound systems when seven watts per channel has a good power using a minimum of components.'

stereo to surround sound systems

Operation of the circuit of the audio amplifier with tda7375
The capacitor C8 decouples the internal voltage divider. Capacitors C5 and C6 are the filter to the power supply. The capacitors 2200?F / 16V are output capacitors. Vs is the power supply can be a car battery or a source of 14 volts.

As suggested pleo friend Ronaldo, now this circuit is dynamic, with at least three variations of assembly, and Quad mount, bridge or stereo system 2.1 Stereo + Subwoofer bridge. Suffice it to set a jumper on the card and switch between P (bridge) and N (normal).

An ideal application is in conjunction of 2.1 systems subwoofer filter posted by Buddy A. Junior, which is used as channel 1 and 2 channel stereo and 2 and 3 in bridge mode to Subwwofer. In bridge mode the output capacitors should be omitted.
Anyway you will find the best application for the circuit
Circuit diagram of amplifier with tda7375 – now dynamic

It can be 12V/30VA with a transformer, a bridge rectifier and an electrolytic capacitor or 4700?F (highest). The maximum current consumption with loads of 4ohms is 2.1 A. You can use loads of 2 ohms, but remember also to increase the size of the heatsink, because the integrated circuit package multiwatt will heat a little more. The fuse circuit to be 2A to loads 4 ohms. The maximum voltage is to tda 18 volts, then the working voltage of the electrolytic capacitors is 35 volts. Recommend a source of 15 volts / 2 amps.
Suggested printed circuit board side of the copper

When assembling the circuit remember that this quad amplifier channels features two four inverted, then you should connect the speakers with the polarity reversed on these outputs, the polarity of electrolytic capacitors which must be of good quality. Block diagram of TDA7375 for more information see datasheet pdf of the integrated circuit TDA7375.

Wednesday, March 23, 2016

TDA2822 made for 5.1 audio amplifier system

Circuit combination of the 3 IC TDA2822  above can be used for small project 5.1 audio power amplifier system with low power output . The input signal used is analog signal not digital (SPDIF) , so it needed some input to the jack input. The speakers are suitable for use have impedance 8 Ohms , and with power 4 Watt, to Left , Right , Rear pair , center , and subwoofer speakers. To run this circuit , is also required circuit for volume control as tone control.

TDA2822 made for 5.1 audio amplifier system

Component and technical Information :
C1-C6 : 220uF/25V
C7-C9 : 47uF/16 V
IC       : TDA2822 x3
CON-1: VCC +12volts DC
CON-2: Ground
CON-3: Left Speaker
CON-4: Right Speaker
CON-5: Rear Speaker
CON-6: Rear Speaker
CON-7: Center Speaker
CON-8: Subwoofer Speaker
X1-2:Subwoofer Input
X1-3:Center Input
X1-4:Rear Input
X1-5:Rear Input
X1-6:Right Input
X1-7:Left Input

See this Printed circuit board below:
 5.1 audio amplifier system

circuit and PCB Design use Cadsoft Eagle Software

Power amplifier 450W with sanken

Circuit of power amplifiers with power output of 450 watts mono with transistor booster sanken 2SC2922 and 2SA1216 , amplifiers are also frequently used in the amplifier a high-power amplifier, which used in an event, in the field and the placed closed. Because this amplifier suitable for the woofer, fullrange speaker, and can also be fixed for the subwoofer speaker. To further strengthen and maximize the amplifier ,its power supply circuit also must be accurate, for electrolytic capacitors in power supply ,voltage capacitors use 80V or more, and a capcity 20000uF upwards, so when the bass amplifier is high , the voltage is not lot of experience dropping. Diode bridge use a minimum of 35A, or adjust the current input voltage. If the power supply has fulfilled the desire, the supply to the power amplifier.

Power amplifier 450W with sanken

In the buffer circuit uses PNP transistor A1266 / A564 / A733 /A1015 / A798 and NPN with MJE340.To the driver circuit using PNP transistor MJE350 and MJE350. For the final amplifier circuit use two set 2SC2922 and 2SA1216. Use a quality sanken transistor to maximize quality sound output.

Below is the amplifier and finshed PCB layout.

Power amplifier 450W with sanken
Power amplifier 450W with sanken
bottom view
Power amplifier 450W with sanken
Top view
If the track pcb does not look, you can download this series in the form of fort board, use the eagle cadsoft application to open it, but its components are not ordered , to their own satisfaction you can design it with your whishes.
 Download file .brd here
Power amplifier 450W with sanken
Installation power amplifier

Power amplifier 450W with sanken
This is power supply

Power amplifier 450W with sanken
already amplifier

12 volt fluorescent lamp and transformer equipped

Valid schematic circuit diagrams of fluorescent lamps with a voltage source using 12 volt battery and the transformer is equipped. This circuit 12 volt fluorescent lamp is very useful if the power goes out or can be used in a dark place with no electricity, but can use  the battery 12V. This 12V fluorescent lamp circuit i have tried and the results are bright, durable until decades. You can use 12Volt fluorescent lamps up to 40W. Use quality 12 Volt fluorescent lamp, do not use the fast heat, because the fast was also damage the transistor at 12Volt fluorescent lamp circuit . Do not occasionally mistaken in putting up the transistor .

12 volt fluorescent lamp and transformer equipped
Description for 12 volt fluorescent lamp Circuit Diagrams :

R1 = 220R/0.5W
R2 = 1/0.5W
C1 = 100n/100V
C2 = 220uF/50V
Q1 = D1885/D1710
A/B= To A fluorescent lamp/ and B to B fluorescent Lamp and just use one pin
B = Battery 12 volt with currents above 5A
Roll of copper wire on ferrite rod, with :
L1 = 1.2 mm diameter wire with many loops winding 20 times
L2 = 1.2mm diameter wire with many loops winding 20 times , and connected after the L1
L3 = 0.8mm diameter wire with many loops winding 500 times , connected after L2 and wrapped over L1 and L2.
F = Ferrite rod diameter of 10 mm
Number 1 - 4 in red will be connected to the winding.

 transformator for 12 volt fluorescent Lamp
This is transformator for 12 volt fluorescent Lamp
Installation fluorescent lamp with accu 12 V
Installation fluorescent lamp with accu 12 V
Related Fluorescent Lamp Circuit : 3V Fluorescent Lamp

Creating a stereo amplifier with TDA2003

Creating a stereo amplifier with TDA2003
Here I make a stereo power amplifier with IC TDA2003, but actually i made it with 2 IC , so that a stereo amplifier . Construction is very simple and easy. I only need 2 TDA2003 mono amplifier circuit , and then combined into one. see TDA2003 Amplifier Circuit

Then the transformer ,  the transformer that i use here is the transformer 10A , so that the power released is greater. Grid power amplifier using the former from the box 10A adaptor , :-) decent can still be used . To view the location of components inside the box , see below :

TDA2003 Power Amplifier

TDA2003 Power Amplifier circuit

TDA2003 Power Amplifier circuit schematic

Simple TDA2003 Power Amplifier

Top - Right

This amplifier is very good if using a transformer 10A, issued no buzzing sound , and strong for high bass . For tone control using Simple Tone Control Powerfull Bass

Subwoofer Active Crossover with LM741 IC

Subwoofer Active Crossover circuit LM741 IC serves as an active filter circuit is active subwoofer speaker or subwoofer filter on the power amplifier. Active Subwoofer Crossover circuit LM741 IC is built using operational amplifiers (Op-Amp) IC type LM741 is easily available in the market. Active Subwoofer Crossover circuit LM741 IC will filter out low-frequency tones (super bass) of the audio signal and reduce the frequency of your audio.

Subwoofer Active Crossover with LM741 IC

Subwoofer active crossover circuit there are several kinds, we often encounter baxandal filter that can be used for low tones (bass) and high tones (treble). Active Subwoofer Crossover circuit IC LM741 is the active filter is set to a low frequency range tone only (bass) so that the optimal acoustic filter. This active subwoofer crossover circuit using LM741 op-amp is supplied with 2 pieces symmetrical ± 15VDC voltage source as shown in the following series of images. Active Subwoofer Crossover circuit IC LM741

see also Subwoofer filter circuit & Subwoofer Booster circuit

Monday, March 21, 2016

500W Mosfet Inverter 12V to 110V / 220V

Inverter Circuit Diagrams

This 500W Mosfet Inverter 12V to 110V / 220V circuit will provide a very stable "Square Wave" Output Voltage. Frequency of operation is determined by a pot and is normally set to 60 Hz. Various "off the shelf" transformers can be used. Or Custom wind your own FOR BEST RESULTS. Additional MosFets can be paralleled for higher power. It is recommended to Have a "Fuse" in the Power Line and to always have a "Load connected", while power is being applied. The Fuse should be rated at 32 volts and should be approximately 10 Amps per 100 watts of output. The Power leads must be heavy enough wire to handle this High Current Draw!

Inverter Circuit Diagrams

Appropriate Heat Sinks Should be used on the RFP50N06 Fets. These Fets are rated at 50 Amps and 60 Volts. ** Other types of Mosfets can be substituted if you wish. The LT1013 offers better drive that the LM358, but its your choice. The Power transformer must be capable of handling the chosen wattage output. Also, Appropriate Heat Sinks are Necessary on the Mos-Fets. Using a rebuilt Microwave transformer as shown below, it should handle about 500 watts Maximum. It requires about 18 turn Center-Tapped on the primary. To handle 500 watts would require using a 5 AWG wire. Pretty Heavy Stuff, but so is the current draw at that power.

Inverter Circuit Diagrams
Inverter Circuit Diagrams
Inverter Circuit Diagrams
Inverter Circuit Diagrams