Non-latching relays stay in continuous normally closed (NC) position without power supply. When power flows through the relay’s coil the relay switches to a normally open (NO) position, remaining here while power is applied. Once power is removed the non-latching relay returns to its static ...
bias via R4 and turns on. Under these conditions, Q1 saturates and pulls Q2’s gate low via R3, thus holding the MOSFET on when the switch has opened. The circuit is now in its ‘latched’ state, where both transistors are on, the load is energized, and C1 charges up to +VSvia ...