Talk:Other Hardware old

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Revision as of 23:46, 30 January 2007 by Comm board (talk | contribs)
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External pressure sensor board (altitude)

--Comm board 07:46, 31 January 2007 (CET)

Pressure Sensor: MPXA6115A MPXH6115A

Interface, 3.3V I2C interface, 100khz, attiny as alternative processor.

  • MCU pic12f675 or equivalent
  • low cost op-amp (not rail2rail)
  • 1Mhz voltage doubler
  • Precision 5.0V ldo
  • 1x pwm output and at the same time ADC input, 0-3.3V
  • 1x raw pressure sensor input, div 1.4 for 0-3.3V range (max resolution is 981 units), optional
  • 1x offset adc input (raw-pwm_out)*gain(1000)
  • Internal temperature sensor for full temperature compensation outside the 0-70degr. range.
  • 16 times oversampling
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