24 Hour Timer Circuit Diagram. 24 hour timer circuit design electronic timers are widely used in many gadgets and have limitless application in our daily life. You might have come across several timer electronic circuits which is capable of producing short time delay.
The main difference is that when the time runs out version 1 energizes the relay and version 2 de energizes it. The first uses less power while the timer is running. These two circuits are multi range timers offering periods of up to 24 hours and beyond.
Both are essentially the same.
Circuit can also be used in a looping mode by removin. The capacitor ct charges via ra which is in series with the 1n4148 diode. Set the circuit to the desired time up to 24hrs to activate the relay. Find out how easy and simple it is to build a long duration timer using just two cmos ics and a handful of other passive components.
