Hi,
I have buy the relay for the purpose to switch the LED ON when their is not electricity and LED OFF when electricity is present. so i connect the relay with the transformer 9VAC the relay is produce the noise sound then i turn off the AC.
At relay it was written that it work on 250VAC.
I also connect the relay with 9V battery but no sound is produced by the relay.
Here is the link from which you can see the relay which i Buy http://www.ebay.com/itm/100pcs-5V-DC-SONGLE-Power-Relay-SRD-5VDC-SL-C-PCB-Type-/250778760511?pt=LH_DefaultDomain_0&hash=item3a6394353f
I have buy the relay for the purpose to switch the LED ON when their is not electricity and LED OFF when electricity is present. so i connect the relay with the transformer 9VAC the relay is produce the noise sound then i turn off the AC.
At relay it was written that it work on 250VAC.
I also connect the relay with 9V battery but no sound is produced by the relay.
Here is the link from which you can see the relay which i Buy http://www.ebay.com/itm/100pcs-5V-DC-SONGLE-Power-Relay-SRD-5VDC-SL-C-PCB-Type-/250778760511?pt=LH_DefaultDomain_0&hash=item3a6394353f