Power MOSFET Module for Microcontroller
In many posts, we saw how to use a common transistor as an electronic switch to drive power loads of voltage and current mightier than those we could deliver with the I/Os of a standard […]
Model Rocket Launch Controller
Most commercial model rocket launch controllers available to buy are either expensive or do not have desired features. After a lot of Googling, I found nothing that fits my little budget. Actually, I wanted a […]
LED Strobe Primer – Part 2/Final
This is the concluding part of the LED strobe article published last year (https://www.codrey.com/electronic-circuits/led-strobe-primer-part-1/). During this long period (sorry for the inadvertent delay) I have already shared several strobe light ideas. But the sequel to […]
White Noise Generator – An Analog Way
Welcome to the lovely sound of analog electronics! Now I’m building some white noise and pink noise generators for an upcoming amateur audio project. In this article, you can see a few basic design ideas […]
TP5100 1S/2S Li-ion Battery Charger – Quick Review!
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 […]
Sawtooth Wave & 555 Timer
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
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 […]
Fish Bite Alarm v1
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 […]
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 […]
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 […]