=20 >=20 > Gosh I hate to add more, but here it is... >=20 > Its EASY to make ONE prototype work. With a little luck, you=20 > MIGHT get two to work. But the proof is whether you can=20 > manufacture 100 without any fallouts. >=20 Well, I wouldn't say it is easy to make one prototype work. It depends upon what you are trying to do. I agree that making one work and making something that is "manufacturable" are too different things entirely. I will say that in my limited experience the very first board is the hardest because you have to figure out all the things that didn't make the transition from breadboard to real circuit. Then you fix those and make number 2, which has fewer problems. Then number 3 might only have one. And then after that the next 3 are pretty straigtforwad. That's the limits of my production runs, though.=20 > We don't consider a design as working until 100 units pass=20 > the production line and into the field without hands being held. >=20 And that is perfectly sensible for a production product. At the risk of being redundant, this is a *research proof of concept*. If it works for the duration of a demo, I'm ecstatic. If the funding agency is interested, then they will take the device and send it off to someone else for real "productization," which could conceivably (probably likely) involve a complete redesign. I'm a researcher, and don't get involved in production issues. I agree they are very important, just not to what I am trying to do. And personally, I enjoy making the first few; after that I am not interested. I don't know if anyone else here is in a similar role, but it doesn't sound like there are a whole lot. I think that my priorities are often different from what someone who is designing a commercial project. Alex -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads