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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!
Solar Lamp With Variable Power Supply And Charger
A simple circuit of a solar lamp with variable power supply and charger is described here. It is useful where mains power failure is...
Simple Morse Code Trainer
Morse code contests are still held in some parts of the world. Practising the Morse code with a simple Morse key kit is interesting.
The...
Versatile Object Counter
Object counters are extensively used in industries. Normally, these are made of expensive microcontrollers or processors. For small-scale industries, this means a lot of...
Smart Bicycle Light
JULY 2012: With this circuit built, boxed up and installed in your bicycle, you can look forward to safely riding your cool bicycle at...
Relay Actuating Circuit with Millivolt Sensitivity
Common electromagnetic relays with coil voltage of 5V, 6V or 12V can operate power circuits in the range of 250 to 300 volts and...
Night Lamp From Scrap CFL
Compact fluorescent lamps (CFLs) are available in different shapes and power ratings. These consist of an electronic ballast circuit and a programmable-logic-controlled tubelight. Most...
Simple Stereo Power Amplifier With 7905
79xx is a widely known series of low-cost, fixed-negative-voltage regulators. These integrated circuits are available with output current of 100-150 mA (L series), 0.4-0.5A...
Smart Exhaust Fan Switch
Exhaust fans in washrooms can be connected to the lighting circuit so that these switch on and switch off with the electric light. But...
Sensor-Based Door Lock
The door lock controller given here is a simple electronic switching circuit realised using a low-cost unipolar Hall effect sensor IC MH183. This CMOS...
Multicolour Curtain Backlights
This circuit comprises two parts: a string of 5mm high-intensity white LEDs connected in series and the circuit wired around. IC CD4060 with an...
Clap-Based Digital Volume Control
This clap-based digital volume control offers four levels of volume control. With each clap, the volume of the audio system increases. After the fourth...
Analogue Wattmeter
Unlike current or voltage measurement, the measurement of power is somewhat inconvenient as power is the product of voltage (V) and current (I) flowing...
Guitar and Microphone Amplifier Using TDA2005M
This simple audio power amplifier works with guitars and microphones, delivering an output power of around 20W over a load of 4 ohms.
The amplifier...
Audible Logic Probe
Using a conventional logic probe, it is difficult to determine what is happening at a point in a circuit above 50 Hz. The human...
Your Guide To Soldering
Attaining ‘zero defect’ production requires a thorough knowledge of soldering technology. Here is a lowdown on the different kinds of techniques, material and equipment...
Simple Parking Counter
This simple circuit can be used to count the number of cars entering a parking lot.
The circuit is built around comparator LM311 (IC1), timer...
Simple Water Temperature Indicator
When bathing a baby, it’s important that the water is neither too cold nor too hot. You test the water by dipping your fingers...
Driveway Alarm
You can install this system in the driveway itself to detect intrusion by a vehicle, person or large animal. It sounds an alarm when...