Subject:
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Re: Cheap pyroelectric sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 6 Oct 2000 20:38:16 GMT
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Original-From:
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John Barnes <barnes@sensors.ANTISPAMcom>
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Viewed:
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820 times
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Ah hah! That's where they come from! I had seen the $40 ones mentioned
in this news group a while back and then found Walmart selling complete
motion detector systems for $8. So I bought a couple and pulled the sensors
out. So they only cost $4! Well that just means I have the relays, CdS cells
and weatherproof light fittings for $4 a set too! Still doesn't seem too
pricey.
JB
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