Simple Latching Relay Circuit Diagram. I could combine your timer circuit with your. Current limiting resistors must be used at the bases of bjt transistors otherwise they might burn.
Relay latching circuit using push button we connect relay and push button as per figure. This circuit will change a momentary pushbutton switch into a always on switch. If you would like to turn it off you will need another switch.
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.
I could combine your timer circuit with your. Here i demonstrate a circuit which is a simple asynchronous sr latch using a relay. Other methods of operating can be used i used an automotive car remote control central door lockin. So i m in need to build a dead simple relay circuit to perform the steady lit part with a delay of 2 sec after connect the power supply.
