Hello guys. I'm making a water tank monitoring system using mainly ARDUINO UNO, and I'm planning to use a 7-watt water pump. But I don't know what relay I should use.
Is this relay appropriate?
AC ? DC ? Voltage ?
AC 220V - 240 sir.
Water + 220V = danger. not recommended for hobby (in my opinion)
Yes
According to the spec written on the top of it, yes. Those relays aren't exactly famous for their durability though.
Since it does not have a UL label, you cannot use it in my state. If you did, no insurance would cover any mishaps.
Uhm another question, where should I attach my external 5V power supply for relay? I wanted to use the Optocoupler functionality. But I'm not familiar with this relay its closely similar to the attached picture above. Much appreciated your answer.
Do you see the + and the - on the circuit board in the picture?
Did you see the yellow square highlighted? I'm pretty sure that's where the external power supply goes. However I'm confused with DC + and DC - on left side and JD+ JD- on the other . Where should I specifically attach the 5V supply?
The "J" things are removable jumpers. Without documentation it is impossible to say what they are for.
I've been looking for the documentation of this relay unfortunately I cant find one.
I found one! How bout this. any idea?
