I have this relay circuit but it doesnt work the way i want it to. I have a Panasonic relay switch. http://datasheet.octopart.com/DK1A-12V-F-Panasonic-datasheet-148175.pdf It is a SPST/NO relay. I need to turn a cartridge heater ON/OFF with the relay. My circuit gives out 8V to switch the relay and it works fine. I check the connectivity of the relay, switchin it on and off and the connectivity breaks and connects accordingly. But when I take the AC supply and connect it with the heater, the whole circuit works as a NC circuit. So the cartridge heater works when there is no 8V going to the relay and stops working when the 8V is supplied. I have attached a very simple outline of the circuit I have.