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Engineering Projects For You
Free electronics projects, circuit diagrams and software codes available for students and hobbyists. Complete instructions on DIY electronic devices also available. These projects have been tested by EFY and are available with source codes. These are helpful with understanding concepts of electronics including basic components. The projects are designed to be helpful for engineering students and professionals building their own designs and circuits. The projects are also compiled from time to time to provide a single destination for project junkies. Let us know how you feel about the content and any thing you would like us to cover in the future. We hope you enjoy the content on this page!
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...
ELECTRONIC METRONOME
A metronome is used by musicians for practice in maintaining a consistent tempo, or rubato, around a fixed beat. This circuit produces a regular...
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...
Timer From Old Quartz Clock
You can build an accurate, low-cost timer from the circuit of an old quartz clock. This timer has a time duration of up to...
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...
MOBILE ELECTRONIC WORKBENCH
Typically, implementing and testing even a small circuit requires an elaborate setup that includes breadboards, a dual DC power supply, hookup wires, ICs and...
Sequential Device Control using TV Remote Control
This circuit lets you switch on and switch off up to nine devices sequentially from your TV remote control.
The circuit consists of an IR...
WEEKLY REMINDER
This circuit reminds you of all the important tasks that are due on a specific day every week. So be it returning your library...
Standby Power-Loss Preventer
Electronic devices consume some power even in the standby mode, i.e., when they have been switched off using a remote handset but not the...
Twi-light using white LEDs
This sunlight-controlled lamp uses a light-dependent resistor (LDR) as the sunlight sensor and a total of 25 high-brightness white LEDs. Separate resistors are connected...
HDD Selector Switch
Using the switch-mode power supply (SMPS) of your personal computer, this add-on circuit lets you switch between three hard disk drives (HDDs) and also...
Timer for Mosquito Destroyer
In electric-heating mosquito repellents, an electric vaporiser heats up a mat or liquid to release non-degrading chemicals into the air and keep the mosquitoes...
Pushbutton Control For Single-Phase Appliances
This circuit lets you switch off and switch on a single-phase appliance using two separate push switches. Such an arrangement is common for industrial...
Doorbell-controlled Security Switch
One way to check whether anybody is at home is to ring the doorbell. Burglars too use this very technique. The circuit described here...
ELECTRONIC CANDLES
Here is a simple circuit that can produce the effect of candle light in a normal electric bulb. A candle light, as we all...