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Now he always knows how high he is in the sky, thanks to a portable altimeter he designed using a micromachined pressure transducer. By exploiting the inverse relationship between air pressure and altitude and compensating for nonlinearities, the device produces acceptable accuracy ( plus or minus 3%) for skydivers in freefall. And after all, Todd lived to tell about it.
| Portable altimeter parts list | ||
|---|---|---|
| Amt | Part Description | Allied Part # |
| 1 | MPX2200A pressure transducer | 858-4998 |
| 1 | 1N5711 Schottky diode | 950-1588 |
| 1 | Digital panel meter | 572-0033 |
| 1 | 10muH inductor | 871-5400 |
| 1 | 20k potentiometer | 970-1175 |
| 1 | 50k potentiometer | 970-1185 |
| 3 | 1N5818 Schottky rectifier diodes | 568-7309 |
| 1 | Slide swich | 676-9169 |
| 1 | AAA battery holder | 839-3063 |
| Additional parts required: enclosure and cover, resistors, capacitors, voltage reference, switching regulator, and amplifiers | ||
For more details, go to
http://www.manufacturing.net/dn/index.asp?layout=siteInfoWebzine&view=Detail&doc_id=119996
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