Subject:
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Need help with bumpers connected to the HB
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 23 May 2001 18:29:07 GMT
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Viewed:
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1445 times
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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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