For those out there who would enjoy a quick and interesting weekend project, this odometer made by [PeckLauros] is for you. Featured on Instructables it is made from the simplest of materials including some cardboard, a calculator, wires, glue, hot glue, magnetic drive key, an old CD and a reader, and a rubber band. *The magnets, when*attached to the CD work in a calculation to add 0.11m to the calculator when a magnet closes the*circuit. [PeckLauros] points out that since it is a homebrewed device, it does have flaws such as adding 0.11m twice when the CD is rotated too slowly. *It is easily fixed by simply running faster. *The video is below the break.
Filed under: tool hacks
