Improving the lighting in your home can make things more comfortable, and can even make dark areas safer, but adding lights without wiring can be expensive. Although there are some areas where adding ...

This is a common activity for all types of classes. Basically, you give students a battery, a bare copper wire and a small light bulb. The students are asked to find out different ways to make the ...

If you’re going camping this summer, or just want a cheap emergency lantern powered by a pair of AA batteries, you probably can’t do much better than [rimstar]’s Joule thief compact florescent lantern ...