Simple 220V Ding Dong Bell Circuit

The post explains how to make a simple 220V mains operated ding dong bell circuit which will generate a powerful ding dong sound each time someone presses the bell push button. This bell produces the classic “Ding-Dong” bell sound but does not use mechanical parts. With an integrated one designed for such use and some […]

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Simple Electronic Gong Circuit

The discussed electronic gong circuit initiates a couple of solenoids in sequence to affect two chimes or gongs one while your doorbell is pushed. another whenever it is released. Any time pushhutton S1 the front doorbell is first pushed C2 immediately charges. This stops switch rebound. that might result in solenoid L2 to activate ahead […]

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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 LED 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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Sound Operated Music Bell

In this post we learn how to make a simple sound operated music bell circuit which can be installed in homes for enabling the visitors to ring the door bell by knocking on the door. A doorbell is sine qua non in every household. Most of the standard types need human intervention to operate. But […]

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Fridge Alarm Circuit

The simple fridge alarm circuit will alert the user in case the fridge malfunctions with its specified temperature cycle specifications. The use of fridge in homes has become a de facto. Recent developments in fridge have defined sophisticated systems that can run even with less human intervention. But there are issue with the old fridge, […]

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Simple Electronic Siren Circuit

This simple electronic siren circuit project aims to explain designing a simple circuit for an electronic siren. It is built on a single chip – CD4011 (IC1). In order to make this work, we need four NAND Gates with 2-input of IC1. Both the gates will be configured to manage high and low frequency oscillator. […]

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Ultrasonic Alarm Circuit

This post talks about an excellent ultrasonic alarm circuit that could be efficiently established for detecting sound pressures over the natural human hearing capability, which could cover from 20 kHz and above. Ultrasound or ultrasonic sound waves was quite possibly discovered prior to mankind lived across the globe by several of the animal variants along […]

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