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| Created | March 18, 2018 |
| Last modified | March 18, 2018 |
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a single 5v supply summing circuit for audio mixing of arduino created waveforms.
The LM386 come two to a package so I just used the second one to drive the LED. We trick the circuit to operate in a single supply by pretending that 2.5v is zero through a voltage divider on the + input.
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