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This cell phone detector can sense cellphone from a distance of one and-a-half metres.
Intruder alert Circuit.
This very simple project, suitable for beginners, is a two color (red/green) signal for a model railway.
How to avoid having an unwanted rear entrance to your garage!
The fear of burglary always annoys people. When lock become less safe, one can seek help of electronic systems. Such a security system is described here.
This circuit measures temperature in Celsius scale and displays it on an alphanumeric LCD screen.
A simple starter project that will let you get the measure of most capacitors. Five switched ranges: 1nF to 10uF.
Here is a system based on PIR motion detector module that can be used for security or corridor lighting in power saving mode.
Using this circuit you can communicate with your neighbors wirelessly!!!
A circuit for wireless microphone.
This one is handy for hobbyist. They always need to test the transistors.
A simple circuit with which you can on or off a relay just by your touch.
A fancy project for hobbyist. Control your device just by sound.
This is a circuit to test for N-mosfets.
The most common beginner project, Metal Detector.
This is an Emergency Light circuit in case of Load Shading.
A few months ago, I decided to build a compact, yet effective alarm. This is what I come up with.
This is an enhanced 5 digit keypad.
The circuit presented here wakes you up with a loud alarm at the break of the daylight.
Short circuit alarm circuit.