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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!
PORTABLE SIGNAL WAND
Flashing lights have varied applications. For example, travelers can use these as warning beacons on highways to catch the attention of the public in...
Remote Phone-Bell Ringer
Did you ever miss an important telephone call simply because you were away where you couldn't hear the phone ringing? This should not happen...
PEAK LEVEL MONITOR
Measurement of peak level is useful while testing an amplifier or a similar device. It is handy while testing a logic circuit, as it...
9V Converter Using Two AA Cells
Normally, 9V PP3 batteries last less than a couple of hours if used continuously. These cannot be used if the voltage is below 7.8V....
Electronic Water Alarm
Aburst water-supply hose of the washing machine, a bathroom tap that you forgot to close, or a broken aquarium wall may turn your house...
Door-Opening Alarm
Children are at a high risk of drowning in a swimming pool. Majority of accidents occur when children get into a pool unsupervised. Such...
Solid-State Two-Way Switch
Two-way switches, more profoundly known as staircase switches, are widely used when a load has to be controlled from two ends of the location....
USB-Powered PC Lamp
This white LED lamp lets you use your PC or laptop at night without disturbing others’ sleep. It produces a soft white light just...
Analogue Capacitance Meter
The principle of operation of this meter is based on pulse-width modulation. Larger the capacitance, higher is the pulse-width and vice-versa. The meter given...
Car Reverse Horn
This car reverse horn can be used with any vehicle having a 12V battery. Transistors T2 and T3 form an astable multivibrator (AMV) that...
Battery Deep Discharge Saver
This circuit can be used to ensure that a 12V sealed lead-acid battery does not go into the condition of deep discharge. The circuit...
Pulse Rate Meter
Here is a meter to measure the human heart rate. The pulses are picked up around the wrist (just as it is examined by...
Automatic Bathroom Lamp
This simple circuit can be used as an automatic bathroom lamp controller. It disables the bathroom lamp at daytime and enables it at night....
Door Alert
This circuit can be operated by any kind of switch. For example, it can be used in a shop to warn that a customer...
Over-Temperature Alarm
This circuit can be used as a warning device which triggers an alarm whenever the temperature exceeds a preset level. It can also be...
Simple Alert Timer
This timer is a useful device for people who often forget to turn off devices in time. Suppose you want to boil water in...
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...
Office Monitoring System
This system can be used in offices or hotels to call an attendant from seven different locations. The circuit provides audio indication of the...