Even though I have a large collection of TP4056 modules for charging lithium-ion cells, I recently found a pretty small charger module – TP5100 – capable of charging a single lithium-ion cell or two lithium-ion […]
This guide details how to build a simple sawtooth wave generator using the venerable 555 timer chip that can be used to test some of your homemade circuits and projects. Got any questions? I’m happy […]
Peephole proximity sensor presented here is an inexpensive nearness detector for hobby electronics projects and home automation applications, where we need to sense the presence of a person (or object) in front of an entry […]
A fish bite indicator is a mechanical bell or electronic alarm that indicates to an angler that something is happening at the hook end of the fishing line. There are many types of fish bite […]
It was during Christmas week last year that I received an unexpected gift packet from an online store in India. What caught my immediate attention in that collection was the very small microcontroller chip CH551G. […]
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 […]
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 […]
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 […]
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 […]
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 […]
