Sounds fantastic. 1. =A0For several probe based versions you could consider eg IR pulse for sync. Heath Robinsonish, but may be workable up to some limit. 2. Bit it seems that it's trying to do one thing because of the gee-whizz factor that isn't strictly necessary, and that adversely affects the whole design - which is the "fit it all in the scope probe body". That's a great wow-factor objective, but what are the costs of doing that ($, facilities, flexibility / limitations), and what real advantages does it gain? Adding a (boring, like everyone else has) intermediate box - allows size to be as small as possible and as large as necessary. - allows multiple channels to share the same USB port if desired and thus solves the sync problem. - allows standard scope probes to be used, dearer/better or worse/cheaper as suited to user. - allows specialist probes such as high voltage or super rugged etc. - almost certainly lowers rather than raises the total cost. - Allows some knobs for real men [tm] to twiddle if wanted. - Allows optional standalone screen add on (so does small version really) - Larger - I would lose it less often Pros of in probe version: - Smaller :-) - Gee Whizz factor - Pocketability is great, but eg my HP mini sets something like the lowest size system I'd use it with so absolute smallness is not an absolute advantage. Russell -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist