On Mon, Jan 01, 2001 at 10:52:24AM -0800, Doug Sutherland thus spake: > In the meantime I added new microcontroller circuitry, > and I'm now a walking weather station! I have sensors > for humidity and barometer, a network of DS1820 temp > sensors, and a dozen 12-bit A/D converters for other > sensor connections. I have all of the following devices > connected to a single RS232 serial port on the wearable: > Pretty f*****g impressive! However, a couple questions and a comment: How big is this getup (given your wanting to shrink things) ? Getting your body temp from an extremity is probably not accurate at all. Think of the places a thermometer is placed...(ick)...leaves only the armpit as a workable location to get a good measure of body temp. Finally, although the BX24/uController setup is thrifty of serial ports, it is rather heterogenous. Given that neither the BX24 or the microcontroller can be reprogrammed stand-alone, wouldn't that make it a pain to reconfigure? Cost aside, why not use a small cheap, serial-programmable SBC like the New Micro ones, use a PAL for address decoding and then set up a little bit of software to manage the sensors through polling and/or interrupts? It seems to me to be more flexible, use fewer parts, and not be dependent on external hardware/software as the uC/BX24 are? (OK, the PAL needs to be put in a chip programmer, but given that it only has and can do a finite amount of address decoding, it should not require any alterations short of a major redesign assuming a couple of decode lines are leftover for expansion.) Eric LaForest -- Subscription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org please, Please, *PLEASE* don't subscribe through a forward/false domain
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