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Engineering Projects For You

Free engineering project ideas, circuit diagrams and software codes for students and hobbyists. Complete instructions on DIY electronic devices. EFY tested circuits with source codes.

Simple Key-Operated Gate Locking System

This simple key-operated gate locking system allows only those persons who know the preset code to open the gate. The code is to be entered from the keypad within the preset...

Stabilised Power Supply with Short-Circuit Indication

Here is an efficient 4-stage stabilised power supply unit for testing electronic circuits. It provides well regulated and stabilised output, which is essential for most electronic circuits to give proper results....

8-Digit Code Lock for Appliance Switching

This code lock is useful for appliances requiring exclusive or authorised use by those who know the preset code. If desired, the code can be changed.The circuit doesn’t require additional AND...

Light-Operated Internal Door Latch

Using this light-operated circuit, you can close or open the door of your room remotely from your bed. You just have to focus the torchlight on the light-dependent resistor of the...

Digital Stop Watch

Here’s a digital stop watch built around timer IC LM555 and 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926). IC MM74C926 consists of a 4-digit counter, an internal output latch, npn...

Cell-Phone-Controlled Audio/Video Mute Switch

This cell-phone-controlled audio/video mute switch is highly useful in automobiles. The circuit automatically disconnects power supply to the audio/video system whenever the mobile handset is lifted off the holder for making...

Dome Lamp Dimmer

A reading light inside the car greatly assists passengers during night, but often the interior dome lamp is too bright and distracting to the driver. A linear regulator such as a...

Panel Frequency Meter

Here’s a simple panel frequency meter to measure the frequency of 230V AC mains. When you connect it to the 230V AC line, the display shows the line frequency. Generally, the...

Under-/Over-Voltage Beep For Manual Stabiliser

Manual stabilisers are still popular because of their simple construction, low cost, and high reliability due to the absence of any relays while covering a wide range of mains AC voltages...

Watchman Watcher

Here is a circuit that can be used in offices, stores, warehouses, etc during night to check whether the watchman of your establishment is on duty. For operation, it uses an...

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FIFO Design Using Verilog

FIFO design using verilog
Presented here is a FIFO design using Verilog that is simulated using ModelSim software. In this article,...

Image Compression Using Discrete Cosine Transform Technique

Presented here is a MATLAB-based program for image compression using discrete cosine transform technique. It works for...

Computer Vision Based Quality Control Using Python

Quality control is an important process in all manufacturing industries. Normally, it includes checking the final product...

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