Am using a 4N25 opto to isolate and convert a 12V signal ( from a capacitive sensor ) to an Arduino input pin. The sensor is a N/C system so it is outputting 12V constantly. When the sensor is activated, the 12V drops to ground, so the LED is 'off' and the pullup makes the Arduino Input pin high (…

4N25 opto leaking ?

TomGeorge January 16, 2017, 1:53am 7

Hi,
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
Please include labels on pins and connections.

Thanks.. Tom...

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4N25 opto leaking ?

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