Electronics

Are you sick of the summer heat? Tired of sweating in front of the computer :)? A homemade USB / CD fan from your CD / DVD will help you!

An interesting idea how to make a simple light music with your own hands. To make this craft, you need only three items: the top honor of a plastic bottle with a cap, an LED and

The "perpetual motion machine" is of course conditional, since a permanent magnet and a mechanism with rubbing parts are used that can work forever. And so the idea is not really what, the main thing is simple! By

In the general case, the aeroion generator consists of a power source, a high voltage unit and a radiator. In fig. 1 shows a diagram of a generator of negative aeroions similar to that proposed