Newsgroups: comp.robotics
Path: brunix!uunet!haven.umd.edu!darwin.sura.net!udel!sbcs.sunysb.edu!shane
From: shane@cs.sunysb.edu (Shane Bouslough)
Subject: New IR proximity detector IC
Message-ID: <1993Mar31.041958.7993@sbcs.sunysb.edu>
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Organization: Dept of Computer Science, State U of NY at Stony Brook
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Date: Wed, 31 Mar 1993 04:19:58 GMT
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Hi all,

If anyone is as annoyed as I am with the state of IR proximity detector
circuits available, you might be interested in a part I just came across:

	Hamamatsu S4282 Light Modulation Photo IC

This beauty is the size of a normal transistor (approx 1/4" square).
It has 4 leads, Vcc, Gnd, Vout, LED. All you do is attach an IR LED
to the LED lead, and voila, instant IR proximity detector (the
photo diode detector is built into the part).

An oscillator is built in, and the guy I spoke to said you can even
aim two of them at each other and they won't interfere since they'll
be out of phase ("usually", I assume!).

He couldn't pin down actual distance numbers, but he said distances
of more than a few inches would probably require an external amplifier
to boost the LED.

They have another model with a lens over the photo diode that he claimed
could be used up to 30 feet!

	S4282-11	short range	 $7.75 single unit
	S4282-72	long range	$19.00 single unit

	Hamamatsu Corp.
	Somewhere, NJ
	Phone: 908-231-0960
	FAX:   908-231-1539

I have no affiliation with these folks, it just seemed like they have
a cool part. I bought two of each.

-Shane

--
Shane Bouslough        |   \/                   | shane@sbcs.sunysb.edu
PO Box 890             | /\[]/\  Have you       |
Miller Place, NY 11764 | /\[]/\  hugged your    | "Follow your bliss"
516-928-0939           | /\[]/\  hexapod today? |         -Joseph Campbell
