>> Does anyone know of designs for a PIC >> based altimeter for use in model rocketry? Very recently I stumbled upon a design somewhere on the web that does EXACTLY this. The documentation provided is great, complete with a good description, circuit diagrams, part lists and code listings. The design is an improvement on a similiar altimeter desing for Model Rockets that was published in RADIO-ELECTRONICS of October 1990, and uses the Basic-Stamp as its processor. I can really recommend very strongly that you look at this article. It even features some ingenious way of reading the data from the altimeter. I still have a printout of the original article, but I do not know anymore what the URL of the website is. If you want to search for it on the web, use keywords like Herve Cousin (the author), SCX15AN, Sensym etc. I also still have the original article on my computer at home, so if you don't find it, then please email me at werner@aztec.co.za and I will email it directly to you. Rgds Werner -- Werner Terreblanche http://www.aztec.co.za/users/werner wterreb@plessey.co.za (work) OR werner@aztec.co.za (home) Plessey SA, PO Box 30451,Tokai 7966, Cape Town, South Africa or at home : Suite 251, PostNet X5061, Stellenbosch, 7599 Tel +27 21 7102251 Fax +27 21 7102886 Home +27 21 8872196 ------------------------------------------------------------