5 to 30 Minute Timer Circuit using 7555 IC

This 5 to 30 minute timer circuit achieves times ranging from 5-30 minutes using the 7555 integrated circuit (CMOS version of the popular 555 timer).

Electronic Doorbell Circuit using a 555 timer and a CD4017 decade counter

Electronic Doorbell circuit that lets know that someone is at the door. Made with 555 timer and 4017 decade counter allowing to change the tone of each note

This ON-OFF Switch circuit using a 555 timer is simple, useful and easy to implement.

This circuit has many applications on places where it is necessary to activate and deactivate (connect and disconnect) an electrical or electronic device.

High current 555 pulse generator using a voltage regulator

This pulse generator is useful in applications where the pulses given by a 555 alone do not have enough current.

Automatic night light using 555 and relay

This Automatic night light using 555 IC turns lights on when there is no daylight. The circuit is perfect for lighting single places such as the garden, the front door of the house, the entrance to the garage, etc.

With this sound activated flash circuit, you can achieve incredible pictures of the most unexpected moments.

Pictures like a water balloon that just burst and the water still floats in the air, or when an object of any type explodes.

Missing pulse detector circuit or No pulse detector circuit.

This circuit is very interesting because it can detect or warn of the absence or delay of an expected pulse, which under normal conditions should be received at predefined intervals.

Time Delay circuit using Triac and 555 timer

This Time delay Circuit using Triac and 555 Timer is very useful when we want to activate or switch on, appliances or devices that works on alternating current (AC), after a preset time.

Event Sequencer Using 555 Timer

This event sequencing circuit uses several 555 timer to control an event sequence, where an event does not start if the previous event has not ended.