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arduino - Relay optocoupler driver - Electrical Engineering Stack Exchange

200mv pulse to 12v lock | Electronics Forum (Circuits, Projects and
Relay Module With Optocoupler Circuit Diagram

Optocoupler Relay Circuit Diagram

Optocoupler Relay Circuit Diagram
![[Solved] Proper usage of PC817 Optocoupler | SolveForum](https://i2.wp.com/i.stack.imgur.com/ToUbz.jpg)
[Solved] Proper usage of PC817 Optocoupler | SolveForum

Optocoupler Relay Driver Circuit

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