I tired to control the water pumps with my relay but it seems to be not working.
Whether the pin is HIGH or LOW, if the pump is connected to 'no' it doesn't runs, and if the pump is connected to 'nc' it is always running.
I have no idea why this is happening.
Post a wiring diagram.
The top and bottom power rails need to be connected (see red and blue arrows).
You really don't need the relay card, a logic level MOSFET or BJT will work instead.
A reversed biased diode should placed across the motor terminals
What is the motor's resistance ?
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.
