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.
Desktop Power Supply
Useful for electronics hobbyists, this linear workbench/ desktop power supply converts a high input voltage (12V) from the SMPS of a PC into low...
Inexpensive Car Protection Unit
For car protection, custom made units are available but they are costly. Here’s an inexpensive car protection unit to protect car stereo, etc. from...
Noise Muting FM Receiver
The tuning of a frequency modulated (FM) receiver to a FM radio station frequency involves a lot of ‘hissing’ noise in between the stations,...
Doorbell cum Visitor Indicator
This doorbell cum visitor indicator circuit can also give identification of the visitor to your home in your absence. When you’re home, you can...
PC Temperature Alarm
This circuit uses a temperature sensor to detect the temperature inside the PC and generates an alarm if the temperature exceeds a pre-set limit.
Automatic Lighting Fence
This circuit can sense the movement of a person within the range of three metres from a fence and produce a tone from the buzzer. This is used as a security system.
Automatic Off Timer For CD Players
This is a circuit that initiates a timer for turning off CD player as soon as the bedroom light is turned off.
BODMAS Rule
BODMAS rule is an acronym to help children to remember the order of operations in calculations.. The term BODMAS stand for bracket, of, division,...
Electronic Door Key
This circuit is basically a short-range, infrared remote-controlled electromagnetic relay driver. It can be used to control door motors or solenoid-based locks using a compact and handy remote handset.
Light Operated Doorbell
Light-dependent switches are used in automatic hand-dryers and flushers in toilets. Here is a simple light-operated switch that works in normal light also. You can affix it on the main door of your house to work as an automatic doorbell or a thief alarm.
DIAC Controlled Flasher
This simple flasher finds various industrial applications as a high-voltage indicator or machine-’on’ indicator. It flashes once every second to give a warning indication. It is simple to design and can be wired lead-to-lead without using PCB.
Audible Continuity Tester
Here is a pretty simple, low-cost audible continuity tester that makes use of just one quad comparator IC LM339, some resistors and a piezobuzzer. The circuit including the comparator works off a single 9V battery.
Audible IR Proximity Detector
This circuit gives an audible indication when any object comes in front of the infrared reflecting sensor (containing IR LED and phototransistor). The sound generated by the sensor will be louder if the object close to the reflecting sensor is opaque.
White LED Based Emergency Lamp and Turning Indicator
White LEDs are replacing the conventional incandescent and fluorescent bulbs due to their high power efficiency and low operating voltage. These can be utilised...
IR Receiver Module Tester
Here is an IR receiver module tester for on-board testing of IR modules used for remote control of TV sets and VCD players. The...
IR Music Transmitter and Receiver
This IR music transmitter and receiver contains two circuits - one transmitter and one receiver. The transmitter transmits musical tones through an IR LED and the receiver receives those signals through a photo transistor.
Safety Guard: Time Delay Circuit
When voltages suddenly changes, the change is not smooth, it may go on fluctuating for a short while. This may not be a good...
House Security System
This is a circuit for a home security system that sets off an alarm when someone interrupts a laser beam that continuously falls on LDR of the circuit. A combination of 6 plain mirrors is used to direct the laser beam around the house to form a net.