Latching Switch Diagram. Because it only requires an input current for those brief voltage pulses necessary to switch it between one state and the other a latching relay will offer a lower power draw over extended use periods than most other types of non latching relay. The left switch see circuit diagram for ref when pressed connect one end to the vcc and also powers one transistor that connect other end to the ground and the relay turns on and stays on with permanent magnet.
The diagram of its pins is here. Latch switch using transistors. It shows the components of the circuit as simplified shapes and the capacity and signal connections in the midst of the devices.
And close the contact a to b and c to d.
Latching toggle switches are one of the most popular kinds of switches from their use by kids in basic electricity classes to their use in prototypes and more advanced products they provide a familiar and reliable way to close or open a circuit. Current limiting resistors must be used at the bases of bjt transistors otherwise they might burn. The coil of the latching relay consumes power only while the relay is switched on. When you give the supply to the connection the output load is in off.