I have built a device that relies on a Relay Module to operate a motor, solenoids, & pump. However, after a bit of use, it stops working during the repetitive motor pulsing that lasts for 9.5mins. I can't seem to isolate the problem. I have the relay module optoisolated with GND and JD-VCC coming from one power source and the other VCC pin to the Arduino UNO 5V supply. Typically I see if I change out the ground and power wires I get more use out of it, but after a while, it happens again.
Is there a minimum activation time that the relay needs? Perhaps my pulse is too short? (its a delay(200) in the code).
Any other Ideas?
Supplies being used: