Summary

Inspired by TOPS Science's baby jar galvanometer http://www.topscience.org/activities_print/FreeDownload19.pdf This is a simple way to measure current.

Instructions

I took a Trader Joe's Juice Sweetened Jelly Jar bent two paper clips on each side to hold the axle. I then covered the paperclips in a layer of tape and wrapped 100 turns of 24 AWG wire around it. After I printed the axle/pointer I fitted a small (6mmx6mm) neodymium magnet into the magnet hole and place it inside the jar. Lastly, I stripped the ends of the wires and tested it. It works!! Now I am off to calibrate it.

Jelly Jar Galvanometer