KA431/TL431 Time Delay Switch
The real inspiration for this post actually came from lots of lame designs seen on the web. The last drop was a reasonably great written article presenting a number of blueprints to build timer circuits […]
TL431 & Li-Ion Battery
TL431 is a cheap ‘n’ cheerful yet reliable programmable precision shunt regulator chip available in 3-pin TO-92 package. This monolithic IC voltage reference operates as a low temperature coefficient zener which is programmable from Vref […]
Midget USB LED Lamp – DIY
There is nothing amazing about looking at the design concept of a simple USB LED lamp, I know. But believe me, the midget USB LED lamp presented here has a little power reservoir in the […]
LM336Z-5 Quick Refresher
There are times when it’s astounding to be able to make a programmable shunt regulator, perhaps using obsolete components from your junk box. Recently, I used a modest little circuit to do that thing; the […]
Analog Constant Current Generator
I’ve recently completed the basic design of a general-purpose analog constant current generator employing easily available electronics components. This is a simple circuit that is easy and cheap to build and is very useful especially […]
Automatic Thermo Fan Switch
Thermo fans are an important part of thermal management for high-power electronics because when the temperature increases, performance can suffer, and beyond the point where performance degradation begins, excessive temperature causes catastrophic damage to delicate […]
Crowbar – Fresh Start & New Thoughts
Each new day comes with another chance to see things in a new light. And by all means, don’t be afraid to change your mind. Things get better that way! I recently purchased a few […]
Poor man’s Over-Current Detector
Presented here is the basic circuit of an over-current detector built around a handful of easily available and inexpensive electronics components. This simple circuit for DC devices wakes up when the connected output load draws […]
How to Play with PT100 Sensors
Recently I came across a bundle of PT100 temperature sensors (after a long time), and wanted to build a temperature sensor device with the help of an Arduino. Even though I already had a few […]