The following simple analogue frequency meter circuits can be used for measuring frequencies which may be either sine wave or square wave. The input frequency which is to be measured […]
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6 Best Ultrasonic Circuit Projects for Hobbyists and Engineers
The post discusses a 6 very useful yet simple ultrasonic transmitter and receiver circuit projects which can used for many crucial applications, such as ultrasonic remote control, burglar alarms, electronic […]
Automatic Hand Sanitizer Circuit – Fully Contactless
In this article we will learn how to make a low cost yet fully automatic hand sanitizer dispenser circuit which will allow a touch-free or contactless dispensing of the sanitizing […]
10 Useful Function Generator Circuits Explained
In this post we will learn how to build 10 simple yet useful function generator circuits using IC 4049, IC 8038, IC 741, IC 7400, transistors, UJTs etc. for generating […]
How to Kill Coronavirus with Ozone Gas Generator
The post explains the basic construction of an ozone generator apparatus for disinfecting a closed premise from dangerous viruses such as coronavirus. Ozone is a tested and an officially recommended […]
10 Simple Unijunction Transistor (UJT) Circuits Explained
In the earlier post we learned comprehensively about how a unijunction transistor works, in this post we will discuss a few interesting application circuits using this amazing device called UJT. […]