Simple Single Transistor Relay Circuit

This is a circuit relay that is requires a double pole, double throw relay in conjunction with a single transistor to allow toggling the relay with a momentary push button. This is a simple design circuit. This is the figure of the circuit.

The relay contacts are arranged so the 1000 uF capacitor will charge to about 2.7 volts, in the deactivated state. When the switch is closed, the capacitor voltage is applied to the transistor base through a 560 resistor causing the transistor to turn on and activate the relay. In the activated state, the relay contacts are arranged so the 3.3K resistor and 560 ohm resistor provide continues current to the transistor base maintaining the activated state. While in the activated state, the capacitor is allowed to discharge to zero through the 1K resistor. When the switch is again closed, the capacitor will cause the transistor base to move toward ground deactivating the relay.