This project uses the AtMega328P-PU as processor. Input is the DCC signal used in model railroading projects.
There are 16 MosFet driven outputs, separated from the AtMega by optocouplers (if you want separation).
A 5V power unit is integrated; it can get it's power from DCC or from a separate power supply.
There are a lot of LEDs in the circuit diagram, but you can leave a lot of them (and the ac...
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