Its a Reflective opto coupler.Also what is the purpose of using an opto-isolator if you're just going to connect the inputs and outputs together? There is no isolation!
Woops! My mistake--should have checked the datasheetIts a Reflective opto coupler.
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I have tried to understand myself why R2U has to be more than R3U, but I couldn't, can you explain to me please.panic_mode: just make it 2-5x R3U
by Jake Hertz
by Duane Benson
by Duane Benson