The relay module consists of two sets of pins:
Set1: GND, VCC, Int1, Int2 Set2: JDVcc, VCC, GND
In set 2, VCC and JDVcc are jumpered together normally, which is removed to power the relay coil with external supply.
However, can I supply 5v directly from external source to the VCC pin of Set 1 and connect the GND pin to common ground, leaving the VCC and JDVcc pin jumpered together as they are? It's because I am running out of pins in my Uno.
Will that work?