The operation of H bridge

In this article I will explain the basic operation of an H bridge circuit. This circuit can be used to control a more powerful power source with a less powerful power source. For example I am using this circuit to increase the power of my remote control (RC) car. If you are interested to see …

How to increase RC cars speed

In this tutorial you will learn how you can increase the speed of a cheap RC car by using a 9V battery and NPN type transistor. This article will focus on cars that operate with small voltages from 3 to 6V and do not have a circuit called H bridge. H bridge is an electrical …

Making cheap RC car go faster

This tutorial will show you how you can increase the speed of a cheap remote control car. This approach wont work for all RC cars but I will explain here in which cases you can try this approach. To do this you will not require any special tools or materials excepting maybe screwdriver, battery, two …

Free smartphone function generator

This article will show you how you can use your smartphone as a simple function generator totally for free. This will be especially useful for hobbyists and students who need a basic function generator but they don’t want to spend a lot of money for it. When you are playing a song on your smartphone, …

Basic logic gates

In this section you can learn the operation of basic logic gates – AND, OR, NOT, NAND, NOR, XOR and XNOR gate as well as the operation of BUFFER and Tri-state buffer (Controlled buffer). At the end of this section you will find a video that will help you to remember the truth tables for …