HI,
I am connecting 220v solenoid valve with relay but didn't working. When I give direct current to solenoid valve it works fine and when I connect it with relay it doesn't work.
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Use the COM and N.O. (normally open) side of the relay to break/make the circuit to the solenoid and use a signal line to control the relay from the Arduino. ( drawing here)
I checked but it didnt worked for me
Need to see some code , and a better schematic or link to the relay !
Disconnect the 220v parts for now ( for safety) and test that the relay operates by putting 5v directly to it and listening for it to click
( it is a 5v relay ?)
Inductive loads such as solenoids can damage these cheapo relays .
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There maybe an issue with the code too .check carefully against the code on that site
The 12v "blue cube" relays are crap. They'll not last switching 220v.
Perhaps a SSR would be more suitable? You can have a 5V SSR switch 220V at 10's of amps direct from your Arduino, no intermediate relay or voltage needed.
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