What is sound energy and how does it interact with a non-Newtonian fluid ()? This is just an...
Electronics Projects
Model Rocket Launch Controller
Most commercial model rocket launch controllers available to buy are either expensive or do not...
Electronic Signal Selector Switch Module
If you’re an audiophile, often you have to purchase rotary audio input selector switches for...
Sawtooth Wave & 555 Timer
This guide details how to build a simple sawtooth wave generator using the venerable 555 timer chip...
Peephole Proximity Sensor
Peephole proximity sensor presented here is an inexpensive nearness detector for hobby electronics...
Fish Bite Alarm v1
A fish bite indicator is a mechanical bell or electronic alarm that indicates to an angler that...
Door/Window Knock Sensor – Simple DIY Project Ideas
Recently I came across a dirt-cheap knock sensor module labeled as Keyes KY-031 Knock/ Impact/Hit...
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...
Locker Security Switch
Want an inexpensive locker security switch? Look no further – build this little but versatile...