You know how it is, you wait a long time for one and then all of a sudden a whole load of them come along, this is the second finger operated mouse that we have featured, and this one is the best so far! Just check out the specs: Features: - Wireless, using radio frequency, abs ...

I’ve noticed many people using metal detectors on the beach lately to find treasures or junk but here’s a great way to make one of those yourself! BFO ( beat frequency oscillator ) metal detectors use two oscillators, each of which produces a radio frequency. One o ...