A microcontroller in another circuit I want to monitor controls a relay. I had thought of using a current switch to detect when the switch had been made, but because it's got a cord and doesn't expose enough of the active wire inside, I won't be able to. However what might work is the other side o…

Relay switch

tocpcs April 29, 2012, 4:21am 5

Ahh, the transistor would have it then - so that would pretty much be similar to connecting the output from the MCU to the digital input of the duino.

Perfectly sound ?

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Relay switch

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