Board Layout
Often, we need an audio amplifier for low signal devices such as microphone or piezo transducer. This is a simple low power audio amplifier based on LM386, a relatively cheap IC that’s available in most electronic store. Schematic, Part List and PCB design available below.
Schematic
Part List:
- C1 1nF
- C2 1nF
- C3 1uF
- C4 1uF
- C5 100uF
- C6 10uF
- C9 47nF
- C10 100uF
- IC1 LM386N
- POT1 10K
- POT2 10K
- R1 10R
note: you don’t need to assemble C2, C4 and POT2 if you’re only using single input.
PCB design
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