In this post we are going to construct a stopwatch which automatically starts timer when the runner begins to run and the timer stops when the runner reaches the end. […]
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How to Use Resistors with LED, Zener and Transistor
In this post we learn how to use resistors while designing an electronic circuits using LEDs, zener diodes, or transistors. This article can be very useful for the new hobbyists […]
How to Make a Barcode Security Lock Circuit
A simple barcode security lock circuit or barcode scanner circuit is explained in the following article using just a handful of ordinary components such as an op amp, an LDR […]
Super Capacitor Charger Theory and Working
The post explains a super capacitor charger circuit for charging super capacitors which converts a 12V car battery voltage to an elevated 16V for charging a bank of super capacitors. […]
10 Simple LED Chaser Circuits Explained [Knight Rider, Scanner, Reverse-Forward, Cascaded]
The article discusses the construction of 10 interesting yet simple LED chaser circuits, which not only create beautiful running light effect but are also easy to build. We also discuss […]
5 Simple Alarm Circuits for Protecting your Home/Office from Theft
The following article discusses a few very simple intrusion detector circuits, or ant-theft alarms. The presented designs are easy to build yet extremely effective with the functions. How the Circuits […]