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.
Micro-Solder Pot
To make a great solder joint, component preparation is a must. This sounds unimportant, but it is very important to clean the component leads,...
Electronic Eye Security System
The electronic eye security systems available in the market are expensive, and programming is very difficult for a microcontroller based system. Here is a...
Optical Smoke Alarm
An optical smoke alarm (also called photo-electric smoke alarm) works using the light scatter principle. The alarm contains a pulsed Infra red LED which...
Low-Cost Universal Dual Channel Audio Checking And Troubleshooting Tool
Frequently, we are in need to do audio troubleshooting of electrical and electronic components, installations and equipment. E.g. we may need to check, test and evaluate:
...
Measuring The Charging And The Discharging Current Of The Battery
When we work with rechargeable battery it is useful to have the following functions:
measuring the charging current,
measuring the discharging current,
measuring voltage...
Multi Channel Hardware Driver for Embedded Systems
The real world embedded systems are controlling DC motors, stepper motors, electromagnetic relays, incandescent lamps, powerful LEDs, displays, inductors, transformers, long cables, etc.
On the...
Simple Universal AC Or DC Amplifier with OPA452/OPA453 And Transistors
Introduction
During the experiments with loudspeakers, systems with loudspeakers, transformers, public announcement systems, audio distribution lines and amplifies, etc, we are in need of audio...
Solar Powered Home Lighting System
This project suggests a solar powered home lighting system that uses solar power and LED lighting technology in a more efficient way. Solar power...
Battery Low Indicator
Rechargeable batteries should not be discharged below a certain voltage level. This lower voltage limit depends upon the type of the battery. This simple...
Versatile Water-Level Controller
This simple, economical and versatile water level controller circuit switches on the motor pump when water in the overhead tank falls below the lowest...
Smart Solar Charger
Solar powered lighting systems are now used in rural as well as urban areas. These systems include solar lanterns, solar home lighting systems, solar...
Time-Lapse Photography With Raspberry Pi 3
This project aims at developing a simple time-lapse photography device with Raspberry Pi 3 and Pi camera.
To get the most out of nature without...
Converting the Stereo Audio Distribution Buffer into Stereo Audio Distribution Amplifier
The stereo audio distribution buffer published on page 94 of the July 2013 Edition of EFY can be converted easily into stereo audio distribution...
Low Cost High Impedance Buffers for Oscilloscopes and Voltmeters
Most of the low cost digital oscilloscopes and voltmeters have input resistance around 1 MOhm and input capacitance around 100pF. But in many case...
Two-Watt TBA820M AF Amplifier
Here is a simple AF amplifier project based on TBA820M IC. This amplifier can deliver two-watt output power with 8-ohm speaker using a 12V...
Bipolar Power Supply with LM317T and with LM337T Controllable with Stereo Potentiometer
LM317T and LM337T are well known and low cost adjustable voltage regulators with current limiting up to around 1.5A and power dissipation up to...
Wireless-Powered LED
Wireless power is transferred from transmitter to receiver coil using inductive coupling principle. For wireless power transfer to work efficiently, frequency of the transmitter...
Simple Audio Power Amplifier With NE5534/А And Darlington Transistors With Up To 30W Of Output Power
These days there a lot of audio power amplifiers in integrated circuits (ICs). But it is still interesting to produce audio power amplifiers with...