It comes from an existing CanBus networking board that attaches to a Raspberry Pi. The 5v_GEN on the left comes from a step down power circuit and 5v output is used to power up the Pi.So where did you find this circuit?
Thanks - I'll stick with the design then Edit: on reflection that is important in case somebody powers up the Pi via an external power supplyThe original circuit will block reverse current even if there is voltage on the left side.
The simple one won't.
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