Subject:
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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 15:22:20 GMT
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Original-From:
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Barrus, Brad <bbarrus@cabletron.AVOIDSPAMcom>
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Viewed:
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667 times
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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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Message has 1 Reply:
 | | Re: HandyBoard A/D converter?
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| The 68HC11 has references for the range of the A/D converter. In the HB design they are hardwired to 0 and +5. I believe the pin is Vrh at (URL) and is currently wired to +5. --chris prosser From the motorola manual: 2.2.7 A/D Reference and Port E (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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