Subject:
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RE: More about bumper problem and HB turn itself off
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 24 May 2001 18:18:16 GMT
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Viewed:
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1735 times
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Hi Patrick,
When I connect the bumper circuit to the HB, the HB turns itself off and
doesn’t reset until I disconnect the circuit. After disconnecting the
circuit , the HB resets without any problems.
I’ve tried another thing: when I connect only the supply and the ground to
the analog0 without the signal, the Handy Board also turns itself off.
What shall I do now? Any ideas?
Thanks a lot for you reply,
Jan
In lugnet.robotics.handyboard, Patrick Hui writes:
> Hello,
>
> Can you describe more about "HB turns itself off ?"
> Does the HB reset itself?
> The analog inputs for HB have pull-up resistors. This pull-up resistor may
> cause the problem.
>
> Thanks.
>
> Patrick Hui
> http://www.RobotStoreHK.com
>
>
>
> ----- Original Message -----
> From: "Haberlag" <bhaberlag@compuserve.de>
> To: <lugnet.robotics.handyboard@lugnet.com>
> Sent: Thursday, May 24, 2001 2:29 AM
> Subject: Need help with bumpers connected to the HB
>
>
> > Hi, I've got a problem in getting started with the Handy Board. I'd like • to
> > connect a bumper detection circuit to the analog0 of my HB. But when I
> > connect the bumper circuit to my HB , the HB turns itself off. Can anybody
> > help me? Any help would be really appreciated!
> >
> > I've taken the circuit from the book "Mobile Robots: Inspiration to
> > Implantation"(Loseph L. Jones, Anita Flynn). For somebody who hasn't got
> > this book I tried to describe as well as possible this circuit.
> >
> > Bumper circuit description:
> >
> > From +5V to Gnd are 3 resistances (2.2K ; 1.2K ; 1.2K) connected in • series.
> > Two of three 47K resistances are wired from the nodes between the three
> > resistances to the 5V pin of each micro-switch. One 47K is from the node
> > between the 2,2K to +5V.
> >
> > Each mico-switch is wired up like this:
> > (the left side is where the lever is fasted to the plastic case)
> >
> > left pin to signal
> > middle pin to Gnd
> > right pin to 47K resictance (to +5V)
> >
> >
> > Thanks and best regards,
> > Jan
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