Hello everyone! im having an issue that you might be able to help.
I want to make an automatic irrigation system. When the sensor detects dry soil and the water level sensor knows theres enough water it would turn on the pump and start irrigating.
Everything is working except the relay. im connecting the relay module to vcc, gnd and signal (digital output of arduino through a transistor.)
When its time for the relay to switch, the led signal turns on but it wont switch (theres no click sound).
I wanted to test the relay module if maybe it is damaged by connecting vcc, gnd, and the signal to vcc but it doesnt work. Not very familiar with this module, am i doing something wrong? (i tried another module and same problem)
i attach the diagram an 3 pics when is off and on.
any help is well received!
thanks a lot