nuckolls.bob(at)aeroelect
Guest
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 Posted: Thu Jun 11, 2009 6:17 am Post subject: Measuring voltage on aircraft and engine sensors? |
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At 02:11 PM 6/10/2009, you wrote:
| Quote: | --> AeroElectric-List message posted by: "mosquito56" <mosquito-56(at)hotmail.com>
I am trying to connect my aircraft to a microcontroller and some adc's.
Will a hall effect rpm sensor work on 5vdc? |
Get the data sheet for the sensor you plan to use.
The HE devices I've used in the past to look at
shaft rpms were quite happy with 5v supply. I
suspect most are but the manufacturer's data
sheet is the last word.
| Quote: | | Are the oil temp and oil pressure sensors just pots? |
I presume you're building from scratch. Temperature
and pressure sensors come in lots of flavors.
I personally favor the use of thermocouples for
all temperature measurements. These are most
easily adapted to the 5v microprocessor world
with thermocouple conditioning chips like the
AD594 series.
http://www.mne.psu.edu/sommer/me445/AD594_5_c.pdf
But there are numerous other products using
thermo-resistive sensors to choose from. The
nice thing about thermocouples is that they're
calibrated right off the roll of wire. Pressure
transducers these days are usually amplified
piezo-resistive device like . . .
[img]cid:7.1.0.9.0.20090611090552.01d28c30(at)aeroelectric.com.0[/img]
These can be pretty pricey compared to the automotive
devices that behave pretty much like a rheostat.
[img]cid:7.1.0.9.0.20090611090552.01d28c30(at)aeroelectric.com.1[/img]
You can adapt about anything to your task when
starting from a clean piece of paper.
Bob . . .
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( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
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