Latching Circuit Diagram. Simplest soft latching power push switch on off circuitthis soft latching power switch circuit design contain only two transistor resistors and momentary p. It can be easily built on a breadboard or pcb.
Resistor r1 and r4 work as a current limiting resistor for transistor q1 and resistors r2 and r3 work as current limiting resistor for transistor q2. This creates a basic memory function the relay remembers. When we press push button supply goes to relay a1 point and relay gets on and its contact changes but when we release push button supply cutoffs and relay gets off.
The circuit can be made to change state by applying a signal in this case by pushing a button.
The output responds to the inputs. Relay latching circuit using push button we connect relay and push button as per figure. The breadboard circuit of the above circuit is shown below. Circuit diagram of latching circuit is simple and can be easily built.
