Subject:
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Re: digital ins
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 27 Aug 1997 13:29:13 GMT
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Original-From:
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Jeffrey Strauss Morehead <morehead@ece.utexas.edu(spamless)>
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Viewed:
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1225 times
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If you want to exaggerate the response, perhaps a LM339 +5v single supply
comparator will do. Set up your circuit to go high(+5v) above your 2-3v
range of operation. This solves all your input problems. Loads of
manufactures make this thing. Data sheets are on the web at
Motorola(Design-NET.com, also from www.mot.com),
national(www.national.com) and you can buy 'em from Digikey. Also, a great
single supply op-amp is the LM358.
By the way, I don't know what your application is but if you want to
exagerate a 2-3 volt range and you use a LM358 with a +5v supply then, of
course, your max output is +5V.
jm
On Tue, 26 Aug 1997 David.J.Dostal@lawrence.edu wrote:
> Hi all,
>
> At what voltage on the digital ins does one risk damaging the HB? I
> want to feed an amplified signal to the digital ins on my HB to exaggerate
> the response of a photosensor in the 2-3V range of its operation.
> Unfortunately, this means that at the 5V end of its range, the input signal
> will be near 10V. Will I fry my HB doing this? What are the maximum and
> minimum safe voltages for the digital ins? Resolution and accuracy don't
> matter at these extremum; I just want to know what the circuit can physically
> handle.
>
> Gracias,
>
> David
>
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Message is in Reply To:
 | | digital ins
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| Hi all, At what voltage on the digital ins does one risk damaging the HB? I want to feed an amplified signal to the digital ins on my HB to exaggerate the response of a photosensor in the 2-3V range of its operation. Unfortunately, this means that (...) (27 years ago, 26-Aug-97, to lugnet.robotics.handyboard)
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