Why a stepper? It seems to be a simple job for a standard DC motor. Isaac Em 20/05/2013 09:10, RussellMc escreveu: > Fly or mosquito zapper. > > "Gun" functionally as sold by Jaycar - dart with large flat impact area o= n > front. > > Mosquito - listen for and track sound. > Zap. > > Reload with geared stepper winding back string. > > > http://www.jaycar.co.nz/productView.asp?ID=3DYS5545&keywords=3Dfly+swat&f= orm=3DKEYWORD > > See attached image > > R > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .