Doorbell With Memory Circuit

The post explains how to enahnce your doorbell with a circuit which would facilitate a doorbell with memory circuit and allow the user to know through an illuminated LEDĀ if somebody has pressed the doorbell button while he was out and unavailable at home. On situation it could be helpful to understand when a guest has […]

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Simple Electronic Gong Circuit

This electronic gong circuit simulates the sound of a bell or a gong; The circuit consists of a resonant filter, built around IC2 and IC3, which rings at its resonant frequency when a short pulse is fed to the input. In this circuit the trigger pulse is provided by a 555 timer connected as a […]

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Simple Smoke Detector Circuit

A Smoke detector circuit is an essential system when it comes to maintain safety precaution for any establishment. Having a smoke detector installed makes life easy to save your establishment from any fire attack. Smoke detector is common these days and this project aim to detail the process to building the alert system. Smoke Detection […]

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Screaming Alarm Circuit using IC 555

If you looking for a screaming alarm circuit that would produce a high pitched ear piercing kind of alarm sound, then probably this design will be just suitable for your need. Alarm is commonly known system that generates loud noise. They are widely applied in factories or by military and police authorities, and even on […]

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