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 (±3%) for skydivers in freefall. And after all, Todd lived to tell about it.
Portable altimeter parts list
Allied Part #
MPX2200A pressure transducer
1N5711 Schottky diode
Digital panel meter
1N5818 Schottky rectifier diodes
AAA battery holder
Additional parts required: enclosure and cover, resistors, capacitors, voltage reference, switching regulator, and amplifiers
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