Filter by Categories
HomeEngineering Projects For YouBeginners Projects

Beginners Projects

Sound Sensor Alarm

This 6V battery-operated circuit triggers an acoustic piezobuzzer when a sound is detected. It can also be used as a cheap acoustic-type glass break...

Door Ajar Alert

Have you ever accidentally left your front door ajar and had a pet or your little kid escape? Here is a smart solution to...

TELEPHONE LINE IN-USE INDICATOR

This circuit gives a visual indication of whether a telephone line is in use or not, helping two or more people sharing the line...

RADIO/AUDIO FREQUENCY GENERATOR CUM BFO

This radio-cum-audio frequency signal generator can also be used as a beat frequency oscillator (BFO) for continuous-wave and single-sideband signals. Fig. 1 shows the circuit...

Pull-Pin Security Alarm

Here is a simple and low-cost circuit of pull-pin security alarm. While travelling, rig the alarm unit to your luggage using a home-made security...

Electronic Electroscope

An electroscope is the instrument used to detect charged bodies. Here is an electronic version of the scope that is sensitive and, unlike conventional...

LASER-BASED INTRUDER ALARM

You can use this laser-based intruder alarm conveniently at the entrance of a hall or any other similar location to protect the same from...

AC MAINS BISTABLE SWITCH

This AC mains-operated bistable switch turns on or turns off a device using a miniature neon lamp and a few discrete components. This switch...

MOTOR CONTROL THROUGH PWM

Motion control plays a vital role in industrial automation. It is required in manufacturing plants of industries like chemical, pharmaceutical, plastic and textile. And...

Call Bell With Welcome Indication

Here is a simple call bell circuit that displays a welcome message when somebody presses the call bell switch momentarily. The alphanumeric display can...

CASH BOX GUARD

Most thefts happen after midnight when people enter the second phase of sleep called 'paradoxical sleep.' Here is a smart security circuit for your...

GUITAR EFFECT PEDAL POWER

A friend of mine plays guitar with several guitar effect pedals. He had a problem with battery eliminators and cables of the pedals cluttering...

FLASHER FOR DEEPAWALI

Here is the circuit for a portable electric lamp-cum-LED flasher. It uses a 25W, 230V AC bulb and nine LEDs. When the bulb glows...

Keep Away NI-CD From Memory Effect

Ni-Cd batteries suffer from an undesirable memory effect due to partial discharge. The remedy is to completely discharge the battery before recharging. A simple resistor...

IR-Controlled Water Supply

This circuit can be used in homes or small restaurants for any type of water supply unit, such as toilet flush or washbasin tap. The...

ELECTRIC GUITAR PREAMPLIFIER

Here is the circuit of a guitar preamplifier that would accept any standard guitar pickup. It is also versatile in that it has two...

Simple Key-Hole Lighting Device

When opening the door of your room in the dark, you may have to spend a few minutes searching for the key-hole. Here is...

Halogen lamp Saver For Bikes

Halogen lamps are prone to burn-out owing to their low cold current. The rapid heating inside the lamp melts the thin filament and cuts...
1...333435...38Page 34 of 38

Most Popular DIY Projects

Unique DIY Projects

Electronics News

Truly Innovative Electronics

MOst Popular Videos

Components Corner