nuckollsr(at)cox.net
Guest
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 Posted: Sat Apr 15, 2006 11:20 am Post subject: DIY data acquisition (DAS) systems |
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At 08:37 PM 4/14/2006 -0400, you wrote:
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<aadamson(at)highrf.com>
Looking for a Cheap 10 or 12 bit ADC, the "starter kits" from here are
pretty good. 4 channel I think and as you described, work on a serial
port... Also think they have a USB version
http://www.dataq.com/
Alan
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There are a LOT of very capable products on the market for
gathering and storing data into computers. The one Alan
cited is an up-and-comer. One of my personal favorites for
6-7 years has been . . .
http://weedtech.com/
I have about a dozen of his various modules on the shelf
and they've been exceedingly handy for getting a system
assembled quickly.
Here's an example of a multi-channel temperature, voltage
and current measuring system along with some remote control
features I crafted a few years ago with Weeder Tech modules:
http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_1.jpg
http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_2.jpg
http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_3.jpg
http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_4.jpg
http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_5.jpg
http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_6.jpg
This sat out in the unheated nose of a Beechjet. In pictures
5 and 6 you can just see portions of power resistors bolted
to the base plate that were used as heaters (under software
control of the same program that runs the DAS) that kept
innards of the enclosure above -10C.
This and MANY similar products are really good for gathering
data relatively sedate rates. In this case, one measurement
per second.
The problem Ken is chasing requires much faster sampling
rates. Probably 100/sec minimum, 500-1000 would be really
good. There aren't too many products out there in the
$100 class that will run that fast.
That's the product class we're brainstorming about
right now.
Bob . . .
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