Subject:
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Re: HandyBoard A/D converter?
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 26 Feb 2000 20:21:41 GMT
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Original-From:
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Chuck McManis <CMCMANIS@MCMANISspamless.COM>
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Viewed:
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1071 times
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This calls for a signal conditioning amplifier. Since you're not worried
particularly about slew rate (the handyboard won't do much more than 12khz
sample rate) you can pretty much use any op-amp you want. Ideally you'd use
a single supply one, set the gain for slightly less than 9 (actually 5/.6)
and then feed your signal across a resistor into the op-amp.
--Chuck
At 10:22 AM 2/26/00 -0500, Barrus, Brad wrote:
> Dear Handy Board Masters,
> I am trying to use the handy board for some A/D conversions. The
> converter is set up on a 5 volt scale, the converter is an eight bit
> converter. Over this range I get a resolution of 19.5mV per Step. My
> application is needed from 0 to 600mV. At the current settings this would be
> terrible resolution. Here is my question. Is there any way to set the
> Voltage reference from 5Volts to 600mV. This would allow me to use the
> entire range of the A/D converter and would give me very good resolution.
> Any response would be appreciated. Thank you Brad
>
>
> <http://www.cabletron.com/>
> Brad Barrus
> SLC Hardware Eng.
> bbarrus@cabletron.com <mailto:bbarrus@cabletron.com>
> Phone: 801-887-9490 Fax: 801-887-5789 2835 South Decker Lake Drive Salt Lake
> City, UT 84119
>
>
>
>
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