Subject:
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Re: Handyboard Expansion Sonar Issues
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 5 Feb 1999 15:57:56 GMT
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Original-From:
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Nick Taylor <ntaylor@iname.com>
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Viewed:
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828 times
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jdunn@unm.edu wrote:
> <snip>
> There is a very high probability that you plugged the foil cable in
> backwards. Doing so, even for a moment, will destroy the IC chips.
Please explain. Now I'm worried about damaging my sonar board. Since
the foil cable has conductors on only one side, I didn't think that it
was possible to plug it in "backwards" and still make an electrical
connection.
My understanding of the hookup is as follows:
On the HB Expansion Board pin 1 (gnd) of the Polaroid connector is
toward the top of the board. On the Polaroid Ranging Module pin 1
is toward the left. If the foil cable is connected so that the
dotted edge of the cable is nearest the pin 1 end of each connector,
I fail to see how there is any danger of damaging the sonar board.
Thanks for your help.
- - -Nick - - -
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Message has 2 Replies:
 | | Re: Handyboard Expansion Sonar Issues
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| (...) It's possible that the flat flex cable could make electrical contact either way, since the socket has "teeth" in it that could penetrate the insulation on the one side of the cable. And *don't* trust that the dotted edge is the correct one; I (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
| | | Re: Handyboard Expansion Sonar Issues
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| The quickest check is to go from V+ of the diode string and see if continuity to pin 1 of TL851 and pin 5 of SN28784 are less than 5 ohms. Similarly check from ground of your power connector to pin 3 of TL851 and pin 16 of SN28784 are less than 5 (...) (26 years ago, 7-Feb-99, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re: Handyboard Expansion Sonar Issues
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| There is a very high probability that you plugged the foil cable in backwards. Doing so, even for a moment, will destroy the IC chips. It will still click (I haven't figured that one out yet), but the IC chips and possibly even the electrolytic (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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