Time Delay Circuit Using 555 Timer. The other main components are the resistors r1 r2 pushbutton s1 capacitors c1 c2 diodes and a 12v spdt type relay. This circuit consists of 2 switches one for start the delay time and other for reset.
Calculating delay period of the timer. The breadboard schematic of the above circuit is shown below. It also has a potentiometer to adjust the time delay where you can increase of decrease the time delay by just rotating the potentiometer.
In this project we are going to design a simple time delay circuit using 555 timer ic.
If we want to connect more than one led at the output then we will connect the output of 555 timer to a transistor first. The time period of the delay timer circuit we made is equal to the time taken by the capacitor to charge from 0v to 2 3rd of the supply voltage and theoretically the value is equal to. 555 timer delay circuit. The breadboard schematic of the above circuit is shown below.
