MEGA COLLECTION OF ELECTRONICS DIY PROJECTS
Every week, we publish 2 to 3 projects, sometimes even more! They range from simple circuits for beginners, to advanced projects that you can use to develop complete innovative products! Most projects have been developed by enthusiasts like you. Some by experts. And, some by our team. Many are tested at EFY Labs, and some are not–but they typically have a proof-of-concept video.
Telephone Receiver
Ever wondered how the old telephones used to work? find out here. This is a circuit for a telephone receiver without a dialling section. It consists of a ringing section and a condenser mic.
Power Suppy Failure Alarm
The power supply failure alarm circuit presented here needs no additional supply source as it employs an electrolytic capacitor to store adequate charge...
Mobile Phone Battery Charger
Mobile phone charger available in the market are quite expensive. The circuit presented here comes as a low cost alternative to charge mobile telephones/battery...
LED Based Reading Lamp
This LED based reading lamp circuit uses ultra-bright white LEDs to provide sufficient light for reading while consuming approximately 3 watts of power. In the case of AC mains failure, the battery backup circuit instantly lights up the LEDs.
Experimental Study of Switched Capacitor Circuit
In recent years switched capacitor circuit has gained popularity due to their suitability in integrated circuits.
The two major problems faced by IC designers are:
1....
Anti Bag Snatching Alarm
Here is a simple anti bag snatching alarm circuit to thwart snatching of your valuables while travelling. The circuit kept in your bag or...
Dual Audio Signal Tracer
The circuit described here is of a dual audio signal tracer. An audio signal tracer is a simple device used to troubleshoot for audio...
Automatic Bathroom Light with Back-up Lamp
Sometimes we forget to switch off the bathroom light and it remains on unnoticed for long periods. This automatic bathroom light circuit solves the...
Simple Digital Security System
You can use this simple and reliable digital security system as a watch dog by installing the sensing loops around your building. You have...
Remote Controlled Power-Off Switch
The remote controlled power-off switch circuit given here can disconnect the entire system from mains using the remote for the audio or video systems. This circuit uses a remote control to switch off electrical appliances by the help of a infrared receiver module.
Mains Supply Failure Alarm
When ever AC mains supply fails, this mains supply failure alarm circuit alerts you by sounding an alarm. It also provides a backup light...
Touch Free Timer Switch
This type of infrared proximity circuit is widely used as an electric switch where physical contact is not desired for hygiene purpose. For example,...
PIN Diode Based Fire Sensor
Here is a PIN diode based fire sensor that activates an alarm when it detects fire. Thermistor based fire alarms have a drawback; the...
Optical Smoke Detector
This optical smoke detector uses a low-cost, readily-available, slotted, through-scan, infrared photo-switch. When smoke is detected, the relay energises to activate the audio/visual warning...
Manual EPROM Programmer
The programmer devices required for programming the electrically programmable read only memories (EPROMs) are generally expensive. Here is a low-cost EPROM programmer circuit to...
Wireless Stepper Motor Controller
Here is a low-cost and simple wireless stepper motor controller using infrared signals. Using this circuit you can control the stepper motor from a...
Digital Frequency Comparator
Here’s a digital frequency comparator for oscillators that indicates the result through a 7-segment display and a light-emitting diode (LED). When the frequency count...
Microcontroller Projects: RGB Colour Generator
Presented here is a red, green and blue or RGB colour generator using AT89C2051 microcontroller (MCU). This is a simple and low-cost circuit for...