As part of the overall development of the MA ( multiAnalyser ), I thought it would be sweet to have an option for the knob twiddler. This would be a flat box with knobs and ???. Dimensions could be perhaps 300mm by 75mm by 26mm ( 12 by 3 by 1 ). There would be bi-directional com via RS-232 and USB ( virtual RS-232 ). The box would have knobs that had no rotational stops. ( although a stop could be set by inserting a 4-40 bolt. ) Under each knob would be a place to put a label. On the deluxe model, the labels would be some kind of tiny display. There would also be selector switches. I am wondering whether these should be rotary. Power could come from USB or wall wart. I am looking for suggestions about any part of this idea. Regards AGSC POD -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist