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Hi Nick,<br>
<br>
Thanks for the tip. Yes that is along the lines of what I was looking
for. The Phidget have only 10-bit ADC. "The RawSensorValue property
brings out a 12-bit value (0-4095) for users who require maximum
accuracy. Please note that the sampling is actually done with
an
oversampled 10-bit ADC, but reported as a 12-bit value to allow future
expansion."<br>
<br>
I really do need the 16-bit ADC minimum resolution, 24-bit is
better... I guess we could rearrange the electrons from our sensor
such that we connect the inputs back-to-back and get 20-bit
resolution. I will think about it and see if this is possible.<br>
<br>
Any other suggestions from the group?<br>
<br>
Thanks,<br>
Jim<br>
<br>
Nick Pascucci wrote:
<blockquote
cite="mid:CAJiG1sXqHjBHP_jTLgNoKbgZC0ezQgenesduV6vVU-5wKT4C5w@mail.gmail.com"
type="cite">
<div>Jim,</div>
<div><br>
</div>
You might try looking into Phidgets boards. I'm not sure if they'll
have enough accuracy for you, but it's worth a look.
<div><br>
</div>
<div>Regards,<br clear="all">
<div>Nick Pascucci</div>
<br>
<br>
<br>
<div class="gmail_quote">On Wed, Oct 12, 2011 at 4:22 PM, Jim Ockers <span
dir="ltr"><<a moz-do-not-send="true" href="mailto:ockers@ockers.net">ockers@ockers.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"><font size="+1"><tt>Hi
CLUEbies,<br>
<br>
I'm doing a bit of research and I need to find an OEM data acquisition
module which I can use from a Linux program. That is, it has to have
Linux libraries. Most of what I find on the 'net is for Windows and
they have Labview libraries with only Microsoft Windows support. I
found one company <a moz-do-not-send="true" href="http://mccdaq.com"
target="_blank">mccdaq.com</a> which has a USB OEM module (the
USB-7000
series supports Linux) but those have not enough digital I/Os or else
low resolution (12-bit) analog input. Their more powerful boards are
Windows only.<br>
<br>
Any ideas from the CLUE audience about where to look? This is for an
embedded industrial control type application that also requires high
resolution (very high accuracy & precision) sampling of some analog
inputs. We need 16-bit resolution at least. It doesn't have to be
fast, 4Hz is what we have now. We need at least 16 digital I/O and 8
16-bit analog input. Isolation is good too.<br>
<br>
It'd be nice to get a prepackaged board with software but I've thought
about trying to roll my own with Arduino. The only A/D example I see
for the Arduino is 12-bit resolution. I guess I could put them back to
back as differential inputs and get 24-bit resolution, but either way
that is a fair bit of hardware complexity and time/effort that I'd
rather just buy.<br>
<br>
Thanks,<br>
Jim<br>
</tt></font><font color="#888888">
<pre cols="72">--
Jim Ockers, P.Eng. (<a moz-do-not-send="true"
href="mailto:ockers@ockers.net" target="_blank">ockers@ockers.net</a>)
Contact info: <a moz-do-not-send="true"
href="http://www.ockers.net/msi.html" target="_blank">http://www.ockers.net/msi.html</a>
</pre>
</font></div>
<br>
</blockquote>
</div>
</div>
</blockquote>
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