Build A One Transistor FM Radio

Introduction
AM radio circuits and kits abound. Some work quite well. But, look around and you will find virtually no FM radio kits.

Make Your Own Low-Power AM Radio Transmitter

Objective
The goal of this project is to build a simple AM radio transmitter and to test its broadcast range with a radio receiver.
Introduction
Electromagnetic (EM) radiation is pretty much all around us. For example, light is electromagnetic radiation and so are x-rays.

Tips to Extend Your Lithium Battery Life

Lithium batteries seem to be everywhere these days. We can find them in our cellphones, laptops, portable media players and etc. We all want to make our batteries last as long as possible, but some well intentioned advice from friends, could be harming your Lithium battery’s life span.
1. Battery Memory - When I first got my new cellphone, my friend recommended to fully drain the battery before recharging it. His reasoning was connected to the idea of battery memory.