A timer circuit is used to generate an output pulse after a given period of time. This time can be in the order of seconds or minutes. The length of the output pulse can be varied by changing the frequency at which the clock signal…

A semi-automatic water level controller circuit is used for automatically controlling the level of water in a tank and avoid overflowing. This circuit is made up of a sensor, timer chip, relay, pump driver and power supply. The sensor senses the water level in the tank…

Voltage fluctuations and power cuts adversely affect various electrical appliances such as Tv, music system, refrigerator, etc. Here is a simple and inexpensive circuit using op-amp Lm358 to disconnect the equipment during high and low voltage. We can also use LM324 to design this circuit…

Circuit Diagram Parts Required Tags 20 led chaser circuit 20 led chaser circuit diagram 4017 ic circuit diagram cd4013 how to build a light chaser circuit how to make chaser lights how to make running led light control circuit

This is a very simple circuit built using only a few components to detect ac mains power failure and its resumption. The heart of the circuit is the most popular timer Ic 555 which is wired as monostable multivibrator. ac power supply failure alarm circuit…