Wagner Lipnharski 18/04/2000 15:22 Please respond to pic microcontroller discussion list To: PICLIST@MITVMA.MIT.EDU cc: (bcc: Dan Lloyd/GBPTD/ABB) Subject: Re: Air powered electronics Security Level:? Internal You will be surprised about the "pressure computers", some tinny little pressure components, gates, switches, that together can do complex calculations and so on. I don't know if they still in use, but I saw some marvelous like that 15 years ago operating in highly explosive ambient. IBM was researching "light computers", an array of micro-optical devices that used only a laser as its main power source. Gates and switches change state when hit by a photons, and of course they allow or not photons to go ahead... another science fiction turning to reality. Not a single microampere of current in such high speed computer. *New Scientist had an article a few weeks ago about some guy making logic gates from spinach plants....obviously using photosynthesis as the mechanism.. I wonder if the NasDaq is going to recover on the back of vegetables?....Hmm, something could be said about that. *Dan Spehro Pefhany wrote: > > At 11:50 PM 4/13/00 +0200, you wrote: > >I4m working on a project where the customer don4t want electric connection. > >And no batteries needing to charge, switch or anything like that either. > >Too dark/small/dusty to use solar power. > > There are such things as air motors, used in process control equipment > where electricity is too dangerous. I think the price may be too high > for your application, though, and you'd need a generator too. > > An air-powered die grinder sells for about US$10 retail, Asian made, > with the following specs: > > Operating pressure: 90 PSI > No-load speed: 25,000 RPM > Air consumption: 3 CFM > Air inlet: 1/4'' NPT > Collet size: 1/4'' > > Maybe you could couple that to a generator to get the power you need. > > Best regards, > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > Spehro Pefhany --"it's the network..." "The Journey is the reward" > speff@interlog.com Info for manufacturers: http://www.trexon.com > Embedded software/hardware/analog Info for designers: http://www.speff.com > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=