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.
Call Bell With Welcome Indication
Here is a simple call bell circuit that displays a welcome message when somebody presses the call bell switch momentarily. The alphanumeric display can...
CASH BOX GUARD
Most thefts happen after midnight when people enter the second phase of sleep called 'paradoxical sleep.' Here is a smart security circuit for your...
Photovoltaic Battery Charge Controller
A charge controller is one of the main components of a solar battery charging system (Fig. 1). Its main function is to fully charge...
GUITAR EFFECT PEDAL POWER
A friend of mine plays guitar with several guitar effect pedals. He had a problem with battery eliminators and cables of the pedals cluttering...
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...