> Amazing... Once, I couldn't get enough of playing with steppers... Well, yes, I could sit here all day and make them go round and round, backwards and forwards But then what? I'm going to post them this video, which I find endlessly fascinating and a wonderful repository of motion at work, and see if it inspires anything Mechanical Principles, by Ralph Steiner http://www.youtube.com/watch?v=3D0yVc52QP9rY It seems to me that kids now don't do most things that we used to, mechanically speaking, because so much now is digital and, for want of a better term, pre-packaged with next to no mechanical hackability. Or it's so cheap if it breaks you just throw it away rather than repair I can imagine that in the not-too-distant future, things like stepper motors will be almost obsolete in most appliances as they are replaced with solid state. The floppy drive has gone, the CD/DVD drive will be next, then the HDD > Maybe a Twitter stepper app? Go on ...... Joe --=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 .