Micro LM386 Amplifier Module
A very minimal LM386 Amplifier Module
I wanted some low power amplifiers for a project I made quite a while ago. I ordered a selection of LM386 modules at the time. These were among them.
I have reverse engineered the Schematic for them in Kicad.
The reverse side of the board has a unpopulated pad. Placing a 10uF capacitor on the pad allows the gain to be changed from 20 to 200.
The board has even lower component count then the datasheet recommends. A series resistor and capacitor are omitted between ground and the output. The output capacitor is a lot closer to the 250uF example on the datasheet. The LM386 can be run from a 12V supply, the output I believe is around a mid-rail voltage so the 10V working limit should be okay.
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