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.
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...
Milliohm Meter
Milliohm meter is used to check low resistance of connecting wires. It can deduce the resistance of thick wires, condition of contacts and the...
Door Ajar Alert
Have you ever accidentally left your front door ajar and had a pet or your little kid escape? Here is a smart solution to...