By T.K. Hareendran

International Electronic Design Freelancer • Technical Author • Hardware βeta Tester • Product Reviewer
Articles Written 455

HR202 Resistive Humidity Sensor – Half-Baked!

Electronics are sensitive to extremes of humidity, and moisture seems to be a key contributor to a variety of electronic-system failures. Conductivity in devices can be modified by high humidity, which can lead to corrosion […]

Locker Security Switch

Want an inexpensive locker security switch? Look no further – build this little but versatile project. All components for this project should be readily available at any reasonable electronics components supplier, and the construction of […]

Residential Electronic Pest Deterrent

There’re many residential electronic pest deterrent circuits on the web, and with some research, you will be able to build one yourself for your pest situation. The most practical and cheerful residential pest deterrent solution […]

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 decided to write a short note about that. Let me know in the comment […]

Arduino Larson Scanner

This is the simple way to play with a Larson Scanner. Just buy a Larson Scanner kit like the one shown above and start up the system. This quite popular open-source hardware 9-LED Larson Scanner […]