308 GUIDES | 2541 PAGES | 2 FEATURED | 314 POPULAR
If you want to take your project portable you'll need a battery pack! For beginners, we suggest alkaline batteries, such as the venerable AA or 9V cell, great for making into larger multi-battery packs, easy to find and carry plenty of charge. If you want to go rechargeable to save money and avoid waste, NiMH batteries can often replace alkalines. Eventually, however, you may want to upgrade to the shiniest new technology - rechargeable lithium ion/polymer batteries. In this guide, you will learn all about these batteries, and how to properly use them in your projects.
The most important debugging tool in any E.E.'s toolbox is a trusty multimeter. A multimeter can measure continuity, resistance, voltage and sometimes even current, capacitance, temperature, etc. It's a swiss army knife for geeks! This guide will teach you how measure continuity, resistance, and voltage with a multimeter.
A power supply is a device that supplies power to another device, at a specific voltage level, voltage type and current level. While it sounds simple, power supplies have a lot of little hang-ups that can be very tricky for the uninitiated. This tutorial will try to help explain all about power supplies.
Make your projects to go green this summer with our specialized USB/Solar Lithium Ion Polymer Battery charger! This charger is a very unique design, perfect for outdoor projects, or DIY iPod chargers. We've spent over a year testing and tinkering with this charger to come up with a plug and play solution to charging batteries with the sun and we're really pleased with what we ended up with.