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From: dje@datacube.UUCP
Newsgroups: sci.electronics
Subject: Re: Infra-Red Receiver?
Message-ID: <100500005@datacube>
Date: Wed, 1-Apr-87 09:19:00 EST
Article-I.D.: datacube.100500005
Posted: Wed Apr  1 09:19:00 1987
Date-Received: Sat, 4-Apr-87 12:39:58 EST
References: <1922@ihlpl.ATT.COM>
Lines: 13
Nf-ID: #R:ihlpl.ATT.COM:-192200:datacube:100500005:000:441
Nf-From: datacube.UUCP!dje    Apr  1 09:19:00 1987




I generally mistrust  LED markings;  a disease  I picked  up from too
many Poly-Packs (remember them?)  purchases.   To  check polarity and
operation at the same time, I use a 330 Ohm resistor in series hooked
to a 5V supply (20 Ma).  Proper polarity is indicated by the LED on.

				Dave Erickson
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Datacube Inc. 4 Dearborn Rd. Peabody, Ma 01960 	617-535-6644
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