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malachi347 /r/raspberry_pi
1 point
1970-01-20 05:13:40.306 +0000 UTC

Can someone confirm, once and for all... That to properly isolate a relay board with octocoupling like this one, you remove the jumper, and on those three pins hook the JD-VCC to your external 5v source, GND to external Ground, and VCC to raspberrypi's 3.3v output? (You leave the VCC and GND next to the IN1-8s blank?)