Subject:
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RE: light sensors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 8 Mar 2000 14:46:51 GMT
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Original-From:
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Mar, Ericson <ericson.mar@^NoMoreSpam^csfb.com>
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Viewed:
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953 times
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Also, if you don't want your motherbot to have a "light-bulb" on it...
You can get an infrared LED (or a few to make it brighter) and use the same
concept Barry mentioned.
To get the best result in sensitivity it way be wise to match the peak
wavelength.
The sensitivity curve is usually like a bell so the further away from the
peak you are, the less it will detect.
Check the specs and try to get the closest match.
Order from Mouser to get more of a variety of choices if Radio Shack doesn't
do.
> Ericson Mar
> Global Settlement Systems
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>
> -----Original Message-----
> From: Barry Brouillette [SMTP:breeyet@aol.com]
> Sent: Tuesday, March 07, 2000 10:24 PM
> To: handyboard@media.mit.edu
> Subject: Re: light sensors
>
> Hi,
> Light sensors are about the easiest of any type to hook to a HandyBoard.
> You
> can get inexpensive photo transistors at Radio Shack and put three of them
> in
> a configuration where one is pointing straight ahead and the other two are
> pointing about 30 degrees to the left and right. If the center one is
> brightest go straight ahead, If the left one is brightest, turn left until
> the center one sees a brigther value, and so on.
>
> Good luck,
> Barry
>
> P.S. They are sold as 'Infra Red Phototransistors' but they work fine with
> visible light as well. They are very sensitive so it shouldn't be any
> problem
> to have a small flashlight bulb on 'Momma' and that should be plenty of
> light
> for 'Baby' to home in on.
>
> In lugnet.robotics.handyboard, KIM LEE JUNG <kim6@cooper.edu> writes:
> > Hi,
> > has anyone experimented with light sensors? My group is working on a
> > mama and a baby robot this semester and would like to control baby's
> > movement by using sometype of sensors. We are thinking of mounting sonar
> > sensor to the mamabot so that it could navigate around the room and maybe
> > mount light generating source so that babybot could follow the light.
> > Any ideas?
> > Thanks.
> >
> > Lee
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| hi, Does anyone have a good idea about sound generating source. We are thinking of using Piezo transducers but don't know where to get them. This is for our product design course where we are designing a singnal indicator for an antenna. We would (...) (25 years ago, 9-Mar-00, to lugnet.robotics.handyboard)
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