Self-Dimming LED Lamp
Described here is the do-it-yourself project of a simple self-dimming lamp. The self-dimming lamp is powered by a rechargeable 9V battery and features a push-button switch that triggers one bright LED as the emitter and […]
Power Sequencer – Little Design Ideas
The power sequence is the sequence in which the power is applied and shut down between steps in a sequence. A power sequence is used when there are devices with different power supply voltages mixed […]
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 […]
Electronic Signal Selector Switch Module
If you’re an audiophile, often you have to purchase rotary audio input selector switches for your home audio projects. You can of course buy such selector switches and selector switch modules via usual online channels […]
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 […]
Arduino Garden Lights Controller – Just a Starter
I was looking around for a little garden electronics project, and I came up with the idea of making a strikingly different Arduino garden lights controller. The reason I picked such a theme is that […]
Little EMF Detectors (Funny Ghost Hunters)
Now you don’t have to drain your wallet to buy an EMF meter. Whether you are searching for a ghost hunter or just looking to gauge the electromagnetic field disturbance in your house, a do […]
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 […]