This straightforward audio amplifier may be constructed at dwelling with few elements. You need to use it at dwelling or in a automotive with the 12V automotive battery as energy supply. The writer’s prototype is proven in Fig. 1 whereas the circuit diagram is proven in Fig. 2.
The circuit contains step-down transformer X1, bridge rectifier BR1, 12V voltage regulator IC LM7812, amplifier IC LA4440, 20W loudspeaker LS1, and few different elements. Capacitors C1 and C7 related throughout the provision terminals are used to minimise ripples/noise indicators.
Obtain PCB and Element Structure PDFs: click on right here
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S.C. Dwivedi is an electronics fanatic and circuit designer at EFY