Alternative Barometer MPX4200A

[vinietje]

Dear fellow *-copter fans,

i have some Freescale mpx4200A barometric pressure sensors laying arround, these 5Volt 25 mV/kPa sensors are quite sensive and as i have them lying arround i was wandering if it would be difficult to incorporate then into the multiWii code.

I haven't reviewed the code, but it think reading the adc instead of querying the i2c bus would have to work, perhaps some offset/multiplication to make the readit (??) value compatible with the bosh sensor.

i hope someone can confirm or reject my hypothesis on the modification to support the mpx32.

cheears
Vincent

[timecop]

Go for it.

[copterrichie]

You may like to have a look at this following post. The ADC on the Arduino does not have the resolution to measure that small voltage as you stated, some amplifying circuit is required. the last entree is very interesting because it will convert the signal to I2C.

http://arduino.cc/forum/index.php/topic,70451.msg522977.html#msg522977