Subject:
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Re: Gp2D12 Distance Sensor interface to RCX
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 19 Oct 2001 15:15:13 GMT
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Original-From:
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Stephen Edwards <edwards@cs.vtSTOPSPAM.edu>
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Reply-To:
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edwards@cs.vt=nomorespam=.edu
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Viewed:
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1638 times
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Steven Nickle wrote:
>
> 1 - 7 GP2D12s
> Random Access
> Quick Response
> External Power
> A way for the RCX to monitor power
> small size
Do you want all of the sensors to be active at the same time, or do you
want to be able to activate/disable them?
If they are all simultaneously active, they draw a lot of power and there
is a greater chance of interference. Allowing some to be disabled (by
powering down, which is the only approach for the GP2D12s, I think) can
fix both these disadvantages.
If you want to think about selectively enabling sensors, do you want to be
able to enable/disable each on an individual basis, or use a scheme where
only one selected sensor can be active/read from at a time? Allowing only
one to be active is simpler, but may also slow down response time. There
is a time lag of approx 40-50 ms between powering on (i.e., "re-enabling")
the sensor and getting a valid reading.
-- Steve
--
Stephen Edwards 604 McBryde Hall Dept. of Computer Science
e-mail : edwards@cs.vt.edu U.S. mail: Virginia Tech (VPI&SU)
office phone: (540)-231-5723 Blacksburg, VA 24061-0106
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Message has 1 Reply:
 | | Re: Gp2D12 Distance Sensor interface to RCX
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| They don't need to be all active, just appear that way. I am assuming a dip switch to permanantly deactivate unused, ports. Software control of connected ones would be nice. Usage would go like this: 7 Global variables, a thread checks them on a (...) (25 years ago, 19-Oct-01, to lugnet.robotics)
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Message is in Reply To:
| | Re: Gp2D12 Distance Sensor interface to RCX
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| Very nice. Now is someone would just build my ideal infrared sensor mux for me I would be all set. Features: 1 - 7 GP2D12s Random Access Quick Response External Power A way for the RCX to monitor power small size Anyone interested? (...) (25 years ago, 19-Oct-01, to lugnet.robotics)
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