[Steve Mould] shows us a different take – the experimentation kit called Spintronics, which goes the mechanical way, using chains, gears, springs and to simulate the flow of current and the ...

New models sold for hundreds of ... Makes] shows us in detail the workings of a mechanical calculator. His machine is beautifully made with gears hand-cut from plywood, and follows a decimal ...

A gear close gearA gear is a mechanical part with teeth that interlock with another gear or belt to transfer motion and power while changing speed, or direction in a mechanical system. is a ...