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Stop Damaging Your Arduino! How to Use a 5V Relay with Optocoupler #relay #12v #iomodules
In this video, I break down exactly how to use a 2-Channel 5V Relay Module with an Optocoupler to safely control high-voltage devices (like lamps or fans) using a microcontroller like an Arduino or ESP32. If you’re worried about protecting your board from voltage spikes, the optocoupler isolation is a game-changer! I’ll walk you through the ...
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