Subject:
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RE: pyroelectric sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 3 Apr 1999 21:08:58 GMT
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Viewed:
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1148 times
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Acroname sells a pyroelectric sensor that will work for what you need. The
kit is consists of a Eltec 442-3 detector and a matched frensel lens. The
kit cost is $46. I have successfully used this sensor with the MIT
Handyboard, and assume it will work as well with the RCX. It basically
functions as an actively powered analog sensor (similar to the light
sensor). +5v, ground, and an analog signal output are all that are
required. I would assume the same basic code that drives the lego light
sensor could be applied to the pyro sensor. Details of the sensor can be
found at http://www.acroname.com/robotics/parts/R1-442-3.html
Todd
-----Original Message-----
From: Michael Gasperi [mailto:gasperi@alynk.com]
Sent: Friday, April 02, 1999 7:08 PM
To: lugnet.robotics@lugnet.com
Subject: Re: pyroelectric sensor
OneTimeCRX wrote in message <370462DA.BD45A16A@orion.ramapo.edu>...
> Hi All,
> I was wondering if anybody has been successful with making a
> pyroelectric motion sensor, or if anybody knows of where I can get some
> information on how to make a lego sensor out of one. Thanks in advance!
> --
This would be kinda crude, but you could put two thermisters where I have
CdS photocells in my differential photo sensor and get something like what
you are looking for. You might need to add a stage of gain some how. You
also would also need very light weight thermisters. Look on this page in
the homebrew section for the differential light sensor for more info.
http://ourworld.compuserve.com/homepages/Michael_Gasperi/lego.htm
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Message has 1 Reply:
 | | Re: pyroelectric sensor
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| This is an oppurtune time to interject my problem...I don't have the capacity to understand how you connect a sensor like this one to the rcx. The diagram on the website shows four connection points: V+, reference, gnd, and output. I only retain (...) (25 years ago, 19-Nov-99, to lugnet.robotics)
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