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LA4145 an IC with SIL-9 package and manufactered by SANYO. This ic has miraculous equation with LA4146 and LA4147, so if you do not have the IC LA4145 but you have IC LA4146 or LA4147 , you still can make the above amplifier circuit. The circuit includes circuit of classes on low power because it has low output is 1W with 8 ohm impedance. Technical information : Min. Voltage = 6 Volts Max. Voltage= 12 Volts P. Out            = 1 Watt RL                 = 8 Ohm Ft                  = 40Hz - 17 Khz Icco              = 10 mA You can use to  : Tuner/ Radio Mini VCD/DVD Walkman Ipod/Ipad Mp3, Mp4 player etc.

Not all that omplicated circuit schematic of power amplifiers have a good and quality sound, but in the circuit above , although a little tricky for the layman on the circuit , and the sound quality is also good. Technical information : V max  = 16 Vdc V min  = 10 Vdc P out    = 2 x 9,6W R l       = 4 Ohm

This circuit is also Very simple and easy to make , simply by using the IC and 6 other components such as resistor and capacitor, you have to run this circuit. The IC uses TDA1015T , minimum voltage require 3 volt and maximum voltage required 12 volt. Power output 0,5 Watt mono , its low power amplifier. Power amplifier Schematic below : Click image to view larger If the amplifier does not work , please check : Supply voltage Components , its damaged or not. Input connected or not Output connected or not Supply voltage of each components Line PCB.

This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The circuit also incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of three amperes that the circuit can deliver. This feature makes this power supply indispensable in the experimenters laboratory as it is possible to limit the current to the typical maximum that a circuit under test may require, and power it up then, without any fear that it may be damaged if something goes wrong. There is also a visual indication that the current limiter is in operation so that you can see at a glance that your circuit is exceeding or not its preset limits.    Technical Specifications - Characteristics Input Voltage: ................ 24 VAC Input Current: ................ 3 A (max) Output Voltage: ............. 0-30 V adjustable Output Current: ............. 2 mA...

Low power inverter schematic are only use 9 components , one of which IC 556 , TIP120 NPN Darlington transistor.And turns 10 to 16 Vdc into 60 HZ, output 115 V square-wave power to operate ac equipment up to 25 W. In the circuit first ic originally hires as a timer chip m for stabilizatiom oscilator with components R1 and C1 setting frequency oscilator. Then the two transistor driver, drive the transformer push-pull fashion, When one transistor is biased on , the other circuit cut-off . The transformer is a 120V/18Vct unit that is connected backwards, so that it steps the voltage up rather than down. Oscilator circuit operates from about 4 to 16 V for  stable output.  Part List : R1 = 1K R2 = 12K R3 = 1K R4 = 1/4W C1 = 1uF IC = 556 Q1 = TIP120 Q2 = TIP120 T1 = 120V 18VCT

Low power amplifier with based on the IC (intregated circuit) TA7140 manufactered by TOSHIBA , its have original output power is 0,15 Watts, and the schematic diagram is monolithic power amplifier.Though the amplifier circuit has a low output , but the maximum voltage large enough to 30 volts. Part List : Resistor     = 100R Capacitors = 4u7F , 33uF , 100uF , 1000nF , 4700nF , 47uF IC              = TA7140P Technical information : Max. Voltage = 30 V Min. Voltage = 5 V Max. Output = 1 W RL                =  150 Ohm

GENERAL DESCRIPTION The TDA2613 is a hi-fi audio power amplifier encapsulated in a 9-lead SIL plastic power package. The device is especially designed for mains fed applications (e.g. tv and radio). Features Requires very few external components Input muted during power-on and off (no switch-on or switch-off clicks) Low offset voltage between output and ground Hi-fi according to IEC 268 and DIN 45500 Short-circuit-proof Thermally protected. Circuit Diagram: TDA2613 6 W hi-fi audio power amplifier Datasheet for TDA2613:  Download

Amplilfier power series from the beginning until now did not experience any changes. Some say this series is good, but the series was good fitting assembly and tested the results are not as we expected. The problem is usually treble is less subtle, less sound, sound breaking, buzz, middle of the field tested the bass sound is lost. so you do not have to believe what people 100%. The quality amplifier built-up would differ greatly with the amplifier assembly, a series can be the same but the quality will depend on who manufacture it. Here are a few tricks to try How to cope with a buzzing sound  Power amplifiers are often used in the field blazer. This circuit is said said person is a bell assembly. But you do not immediately interested in this power, the circuit rather complicated and difficult to understand reflect the intelligence of people who first mendisainnya. In my opinion a great power is the power of simple, inexpensive, easily assembled and ration...