Counter Magnet

Old calculator and reed magnet switch as counter

Counter Magnet

A simple counter, based on low cost calculator. A simple counter is based on low cost calculator where the ‘=’ key is wired through a magnetic switch (like the one on a bicycle speedometer) and all you have to do is key in :1 + =. each time the switch is activated by the magnet in each revolutio...

Tags: calculator counter,calculator winding counter,s...