bodypilot90 0 #1 June 4, 2003 http://www.manufacturing.net/dn/index.asp?layout=siteInfoWebzine&view=Detail&doc_id=119996 Friend of mine from california designed this. Quote Share this post Link to post Share on other sites
Guest #2 June 4, 2003 Quotehttp://www.manufacturing.net/dn/index.asp?layout=siteInfoWebzine&view=Detail&doc_id=119996 Friend of mine from california designed this. Sink me - that looks like Todd Owen (analogRTO@aol.com)! "The mouse does not know life until it is in the mouth of the cat." Quote Share this post Link to post Share on other sites
bodypilot90 0 #3 June 4, 2003 lol yep some ppl have way to much time on thier hands Quote Share this post Link to post Share on other sites
nacmacfeegle 0 #4 June 4, 2003 Thanks Bill, if you delve deeper into the article, after registering you can find the circuit diagrams, courtesy of "Todd Owen, Linear Technology Corp, Milpitas" and this footnote....... "Altimeter testing was performed using a DeHavilland DHC-6 Twin Otter for an ascent to 13,000 ft, followed by free descent—limited by the engineer's parasitic drag—to 3000 ft. Subsequent deployment of an aerodynamic decelerator (Precision Aerodynamics Icarus Omega 190) prevented engineer injury or circuit damage. Aircraft rental for testing is available at many local airports. Extensive instruction in free descent and the use of aerodynamic decelerators are highly recommended before undertaking testing of this nature."-------------------- He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me. Thomas Jefferson Quote Share this post Link to post Share on other sites
ERICCONNELLY 0 #5 June 4, 2003 Gets my vote for Geek of the week. I love the lead in: Quotehe always knows how high he is in the sky I guess Geeks can be cool too... Quote Share this post Link to post Share on other sites
FliegendeWolf 0 #6 June 4, 2003 I got as far as Quotemicromachined pressure transducer before giving up on that article. A One that Isn't Cold is Scarcely a One at All Quote Share this post Link to post Share on other sites
billvon 3,121 #7 June 4, 2003 I built a few of those a while back when Scott Smith and I were considering reviving his digital altimeter product. They work pretty well. Quote Share this post Link to post Share on other sites
Guest #8 June 4, 2003 QuoteI built a few of those a while back when Scott Smith and I were considering reviving his digital altimeter product. They work pretty well. About 10 years ago, I considered designing something along those lines, but linear ICs and I don't get along very well. The application was static and dynamic water-pressure transducers for autonomous underwater vehicles. What really stopped me was writing the code for the 8051 -based embedded controller and mating it to the other sensors. Getting the op-amp circuitry to track correctly, and the bridge circuitry for the sensor was a snap. Newer sensors, I note, have their own bridging built in..., but there's still the matter of getting the software in the machine to make it do its magical stuff. Never was a programmer, and developer tool prices for the 8051 were insane. Nowdays, it could all be done in no time with a Basic Stamp. It all became moot when the vendor changed his mind. What's kewl about Todd's schematic is that he's got an DC/DC op-amp generating +5 and -5 from a single 1.5v battery...schweet!"The mouse does not know life until it is in the mouth of the cat." Quote Share this post Link to post Share on other sites
bodypilot90 0 #9 June 4, 2003 perhaps they need a webpage, geeks who jump! Quote Share this post Link to post Share on other sites
