Subject:
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Re: Newbie Questions (Sensors)
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 11 Jul 1996 00:00:19 GMT
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Original-From:
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Fred G. Martin <fredm@media.mit.edu{StopSpammers}>
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Viewed:
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1788 times
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> I ordered from LEGO, their "sensor suite". I managed to wire and
> use the touch sensor. But I am puzzled about the use and wiring
> of their Light Sensor (9890) and their angle sensor (9891). Can someone
> provide me with a short synopsis? Thanks.
>
> I did wire the male header pins onto both, plugged them in the input
> ports to see what I was getting. The range of values coming from the
> light sensor are 83 (in light pointed directly at it) to 94 (ambient
> as well as a finger placed on it). The angle sensor just gave a closed
> switch reading (value 1).
using the LEGO light and angle sensor is non-trival; custom HW and SW
drivers are required. See
ftp://cher.media.mit.edu/pub/projects/miniboard/hobbytip/legosens.txt
for details.
> While I am at it, what is a convenient (something that involves getting
> a part(s) and simple wiring) way to do near range (0-12 inches) distance
> sensing off of the handy board?
0-12 inches is hard, but 0-1 or 2 inches can be done with a simple IR
reflectance sensor. See the sensors&motors page for wiring diagram.
It's a somewhat imprecise technique, affected by ambient lighting and
the reflectivity of the object in the field of view.
> OK, two more questions:
>
> Can I run the board in tethered mode (so the control program is running
> on the MAC)?
>
> The above question is really to also find out if there is a way to control
> the board through MAC Common Lisp.
You could write your own IC program that accepted a serial protocol of
your own making to control motors and report sensor values. See the
FAQ for info on taking over the serial port.
> And, finally (!) is there a way to get data back from the board (like large
> amounts of numbers) after a run?
See above.
-Fred
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Message is in Reply To:
 | | Newbie Questions (Sensors)
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| Greetings! I have a couple of "newbie" questions if you please: I ordered from LEGO, their "sensor suite". I managed to wire and use the touch sensor. But I am puzzled about the use and wiring of their Light Sensor (9890) and their angle sensor (...) (28 years ago, 10-Jul-96, to lugnet.robotics.handyboard)
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