Electronics are sensitive to extremes of humidity, and moisture seems to be a key contributor to a...
Author - T.K. Hareendran
Poor man’s Driveway Alarm
With a driveway alarm, you can be sure your property is protected from intruders. The primary...
How to Build a Cheap Panic Alarm/Button?
The key purpose of a panic alarm (also called duress alarms, hold-up alarms, or panic buttons) is...
BJT & Diode Temperature Sensors – A Quick Walk
When it comes to everyday temperature sensing, the thermistor is the most simple and inexpensive...
Locker Security Switch
Want an inexpensive locker security switch? Look no further – build this little but versatile...
Poor man’s RC Battle Switch/RC Relay
This is quite a fun little project that can easily help you to build a battle switch for your radio...
Residential Electronic Pest Deterrent
There’re many residential electronic pest deterrent circuits on the web, and with some...
Audio Induction Loop Receiver (Quirky Ideas)
Little version of the audio induction loop receiver presented here can serve a variety of purposes...
Arduino pulseIn() Primer
A while ago someone asked me via email how to read a pulse input on an Arduino I/O pin. So, I...
Arduino Larson Scanner
This is the simple way to play with a Larson Scanner. Just buy a Larson Scanner kit like the one...