Controlling switch with relay driver

The circuit above is a circuit of drivers to control high voltage using the relay. Relay is controlled by an NPN transistor , its that works on 5V voltage and has diode in it, if the relay does not have s diode should be given with diode 1N4007 . Pin relay to move the switch connected to V+ 5V and other is connected from driver NPN transistor , the base od the transistor may have input such us from circuit of infrared to control the distance, or with some other input.

Read this circuit »