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The following schematic diagram is very simple mini audio amplifier circuit. The amplifier which use TDA 7052 as the main component, will gain the power output up to 1 Watt . Power supply voltage range for this circuit is about 6-12V for maximum performance and no heatsink required.
Components list:
C1 = 2.2uF/16V electrolytic capacitor
C2 = 100nF ceramic/mono
C3 = 100uF electrolytic
R1 = 1K ohm resistor
R2 = 10K ohm potentiometer
IC = TDA7052
8 pin IC socket
The following schematic diagram is 1 Watt stereo audio amplifier circuit which use IC KA2209 as the main active component.
Component part list:
R1 R2 = 10K
R3 R4 = 4R7
C1 = 10uF/16V
C2, C3 = 470uF/16V
C4, C5 = 100uF/25V
C6, C7 = 100nF
IC = KA2209/TDA2822
IC socket = 8 pin
This circuit was built using a combination of power-amplifier IC TDA2030 with a pair of power transistors KT818 and KT819, or a pair of power transistors BD708 and BD705.
200W HiFi power amplifier circuit diagram:
This amplifier circuit is built on the bridge system in which the speaker ports connected to the output point from the two amplifiers. None of the speaker port which is connected with the ground point of the circuit.
