involute gears' and 'cycloid gears', based on the difference in tooth shape. Both types have their own advantages, but technology blogger lcamtuf explains the advantages of involute gears.

Historically, coffee has needed two things to grow successfully — a decent altitude and a warm climate. Now, a group of scientists from the VTT Technical Research Centre of Finland have managed ...

We’ve read a lot about oscillators, but crystal oscillators seem to be a bit of a mystery. Hobby-level books tend to say, build a circuit like this and then mess with it until it oscillates.