Newsgroups: comp.robotics
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From: altenbur@plains.NoDak.edu (Karl Altenburg)
Subject: Re: Infos needed about Hamamatsu sensors
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Date: Wed, 15 Dec 1993 23:47:44 GMT
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Vincenzo Romano (vromano@nyx.cs.du.edu) wrote:
: I'd like to receive some informations about the "S4282 Light Modulation
: Photo IC" I read about in the comp.robotics FAQs.
: Anything  will be apreciated! Thanks!

The response I gave, that's in the faq pretty much describes the S4282-11

synchronized light proximity sensor.  I'm using them on a set of mobile

robots for obstacle detection.  As I said in the faq they are small chips,

encased in clear epoxy.  They have a built in photodetector, oscillator,

LED driver, pre-amplifier and signal processor.  You can supply voltages

between 5v and 16v and they cunsume between 6mA and 11mA (without

attached LED.)  They typically deliver 35mA to the LED with a maximum

of 60mA.



Detection ranges are typically about 8cm (3") using high output IR LEDs.

I'm using high brighness red LEDs and get detection ranges between

1.5cm to over 9cm depending on the surface being reflected off of.



They are a very nice solution for small robot obstacle detection because

they require very few parts (I'm using three - chip, LED and a resistor)

especially compared to using a 555 timer for the driver side and either

an IR receiver or some kind of decoder chip/photodiode set up on the

receiver side.


--
Karl R Altenburg				altenbur@plains.NoDak.edu
North Dakota State University, Fargo, ND  58105

All things are artificial, for nature is the art of God.  SIR THOMAS BROWNE
