Hello. I'm currently trying to connect this Arduino due to a 2 relay channel.
Current configs:
VCC -> 5V
GND -> GND
IN1 -> 2
IN2 -> 3
Do i have to do anything else? I've heard people use JD-VCC, VCC, GND (located next to the pins).
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You might run into some issues with the reference voltage vs the output voltage being off, since the Due outputs 3.3v instead of 5v. If you hook everything up and the relays don't kick when they should, flip the VOC from the 5v to the 3.3v.
Also, if your relays require any amount of power (I assume they do), make sure to use a seperate power supply for the relay itself (JD-VCC&GRDN). Just match the power supplied to the range on written on the relay.
The JD-VCC vs VCC is a fine point to consider though, the JD-VCC allows for the opto (or is it optical) isolation of the circuit, so you don't have to fret about grounding things, but the VCC bypasses the isolation so it can prove to be a bit dangerous to the hardware.
Hope some of that helps.
-GN
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