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

Pelleplutt April 30, 2014, 5:35pm 8

IF you connect an rectifier between the projector and the optocoupler it will work.
BUT the current can be to high for the optocoupler.

Pelle

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