Analog Optocouplers – Quick Starter
The prime intention behind this little post is to share some notes about analog optocouplers which might be useful for hobbyists, students, etc. I know many novices who want to learn the secrets of analog […]
Mighty LED Flashgun v1
This article is a mere pointer on how to build a mighty light-emitting diode flashgun controller. The presented project idea is intentionally kept do it yourself-friendly by using easily available components. Before we step into […]
Micro Mouse Wiggler – DIY
Finding your computer asleep when you come back from your tea break might be annoying but what’s even more frustrating is when doing long software installs where screen lock and/or sleep mode may be enforced […]
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 Sensor. The other day I bought a couple of those modules from an online store. It’s pretty small and easy […]
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 […]
Poor man’s Driveway Alarm
With a driveway alarm, you can be sure your property is protected from intruders. The primary reason to get a timely driveway alert is to detect when a vehicle or person enters or leaves your […]
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 to allow a person under threat to quickly call for help in the event of an emergency. There’re […]
BJT & Diode Temperature Sensors – A Quick Walk
When it comes to everyday temperature sensing, the thermistor is the most simple and inexpensive component to get temperature data at ease. That’s fine, but in this article, I’ll explain how to use common bipolar […]
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 […]
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-controlled (RC) model aircraft. The reality is the basic design can be used and/or adapted to […]