ive got the 5v from arduino going into the vcc on the relay, gnd to gnd. the 12 v dc plug is connected to the water pump with the negative split connected to NO and COMSorry, scrub that .. .. .
It looks as though your trying to power a 12vdc Relay coil with 5vdc from the Uno .. ..
Thankyou so much, very appreciated!!Yes .. .. .. ..
If you read the print on the back of the relay
12vdc is the coil - used to operate the switch
10A - 250vac - max load for the switch
15A - 125vac
you need a relay with a 5vdc coil
If you Google 5vdc Relay module there's loads of good examples
its a 4 channel 12 v relay from duinotech link is https://www.jaycar.com.au/arduino-c...N3Tqqd-MmrSOAST2AeoeMF8SelO_2ZnBoCNKoQAvD_BwEDo you have a link to the relay board? It looks like it uses opto-isolators to switch the relay and Vcc may need to be 12V (on the relay board only).
It needs 12 V on the Vcc connection of the relay board.its a 4 channel 12 v relay from duinotech link is https://www.jaycar.com.au/arduino-c...N3Tqqd-MmrSOAST2AeoeMF8SelO_2ZnBoCNKoQAvD_BwE
Yes, that should work.could i use a 5v relay instead and use the arduino?