Magnet Wire Measurer

MAGNET WIRE MEASURER: Sometimes you need to measure out an exact length of wire. This comes in handy when winding electromagnet coils using a drill.

This object holds a pair of bearings, which rotate when a wire is pulled between them. A small magnet on one of the bearings is detected each time it passes a hall effect sensor glued to fixture. Each pulse from the sensor is counted by an Arduino microcontroller, which displays the length of wire on your computer via the serial monitor. Designed and tested by David Hartkop for the Pueblo City-County Library District's *Idea Factory* makerspace.

This system has been tested for magnet wire ranging from hair-thin up to around 20 gage. The resolution is related to the circumference of the bearing and the number of magnets used. The code given is just for one magnet and is pre-set to feet. Feel free to hack as needed!