Pushing the button once will energize the relay. Pushing it a second time will de-energize the relay. Any simple momentary action push-to-make switch will do. The prototype has a single-pole relay. But you can use a multi-pole relay if it suits your application. The circuit will work at anything from 5 to 15-volts. All you need do is select a relay with a coil voltage that suits your supply.
This simple circuit will energize and de-energize a relay at the push of a button. Any type of momentary action push-to-make switch can be used. Pushing the button once – will energize the relay. And pushing it a second time – will de-energize the relay.