Poor man’s Car Power Probe
You do not need to read this post if you are willing to thoughtlessly throw away your hard-earned money to buy a car power probe that only has very cheap electronic circuitry inside. On the […]
A Hyper LED Switch
This post explains how to build a Hyper LED Switch using a set of simple and inexpensive electronics components that are available everywhere, you can even find them in your junk box. So, what is […]
An Eternal LED Blinker – DIY
Once again, the design concept of an Eternal LED Blinker configured to operate from a DC supply in the 3V to 12V range and consisting of only a few components. Since its power consumption is […]
Another Junk Box Solar LED Candle
Solar powered novelty items such as an electronic candle have become very inexpensive and common place. Looking from the outside, it consists of a small solar panel to harvest power from daylight and some sort […]
Water Activated LED Marker
The water activated LED marker is a great scuba diving or night diving accessory. Its bright marker light turns on when its sensor probes come into contact with water and turns off when the probes […]
NE555 0-10S Delay Timer Relay Module
Sometimes you may need ready-made hardware to set up a simple timer to help you control something at the right time. No wonder, Chinese electronics have many instant solutions for that, the simplest of which […]
An Eternal LED Scarecrow
Recently, I wanted to try an electronic scarecrow in my lab window to scare off some birds (often nocturnal) that make a lot of noise and dirt. Although there are many options for building one, […]
Self-Lock Delay Switch Module DIY
Self-lock delay switch is a simple timer module that produces a fixed square pulse. It is designed around the 555 timer and uses a tricky negative edge trigger to ‘run and lock’ the timer. The […]
Multipurpose Power-Thrifty LED Flasher
Sometimes you may need to make a battery-operated lamp flasher suitable for a variety of applications. In this post you will see the design concept of a 555 timer based multipurpose LED flasher that requires […]
Universal Pulse Extender Module
On certain occasions it is necessary to use a sensor module that generates a relatively short pulse to indicate a change of status. If the duration of its output signal is too short, the associated […]