In this post I will show how to construct a stopwatch which automatically starts timer when the runner begins to run and the timer stops when the runner reaches the […]
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How to Use Resistors with LED, Zener and Transistor
In this post I will explain how to use resistors while designing an electronic circuits using LEDs, zener diodes, or transistors. This article can be very useful for the new […]
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
In this post I will explain a super capacitor charger circuit for charging super capacitors which converts a 12V car battery voltage to an elevated 16V for charging a bank […]
10 Simple LED Chaser Circuits Explained [Knight Rider, Scanner, Reverse-Forward, Cascaded]
In this article I will explain the construction of 10 interesting yet simple LED chaser circuits, which not only create beautiful running light effect but are also easy to build. […]
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 […]