Subject:
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Re: Pull Up Resistor
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 6 Aug 1998 17:04:40 GMT
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Original-From:
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Rick Moll <rickmoll@mvp.STOPSPAMnet>
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Viewed:
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1274 times
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Rick Moll wrote:
> So first thing, I would use the 4.7K pullup!
One more thought. I assume you are using a seperate supply (of some sort) for the
Sonar module, so be sure to tie the pullup to the HB's +5V!
Rick
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Message is in Reply To:
 | | Re: Pull Up Resistor
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| (...) I just checked my copy of the Polaroid Sonar Module documentation, and it does in deed state that the module can sink up to 0.1 mA when ECHO is pulled high. It sounds like your module is drawing around 0.064 mA = ((5V - 2V)/47Kohms), so it is (...) (26 years ago, 6-Aug-98, to lugnet.robotics.handyboard)
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