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Digital Altimeter Circuit

2015-01-16 09:37  
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A pressure sensor (IC4) is used with a dc: amplifier to convert the bridge output (IC4) to a single-ended voltage. ICld provides a reference voltage for setting barometric pressure. IC3 is an A/D converter manufactured by Intersil. This drives an LCD module. Calibration reads out in fact.
Digital Altimeter Circuit

A vacuum pump and a water-based manometer can be used for sensor calibration.

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