Hello, I've made a small circuit using the Optocoupler diagram to use a 4N35 optocoupler to switch the remote control of a 35mm slide projector. The circuit I have made works when I test it with an LED using the 5V from the Arduino, but when I connect the DIN plug that leads to the projector (20V),…

4N35 Optocoupler confusion

Grumpy_Mike April 30, 2014, 1:38pm 4

. It's not a 4N23, it's a 4N35 Optocoupler.

OK but the answer is still the same.