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I am having an annoying issue and any help would be appreciated. I have a NodeMCU connected to an 8 channel relay. I have 3.3v and GND from the Node going to the VCC and GND on the board. I have a 12v 3a power supply stepped down to 5v which is powering both the NodeMCU and then connected to the JD-VCC and GND on the relay board. I can send the board a command for the relay and the relay LED turns on, but the relay doesn't click to send the voltage on to my sprinklers unless I tap on the relay. I thought originally that the relay board was faulty and ordered another one, but this one is doing the same thing. I know I am screwing up something here, I just can't figure it out.