Re: How do i check the polarity of an LED?

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: How do i check the polarity of an LED?
From: Christian Schmadalla <St000328@HRZ1.HRZ.TU-DARMSTADT.DE>
Date: Wed, 3 Mar 1999 13:50:33 +0100
Organization: TU-Darmstadt
References: <36DC8AE4.1249051@lynx.neu.edu>
Reply-To: Christian Schmadalla <St000328@HRZ1.HRZ.TU-DARMSTADT.DE>
Xref: paladin.american.edu bit.listserv.calc-ti:28274

Mark Logan wrote:
>
> With a test meter?  I soldered a 2v led into my homemade serial link,
> but i'm not sure
> if i put it in the right way.  Its too late to check which lead is
> longer, can i find out with a test meter?

Look at the LED from the side. One wire leads to the base of the
substrate which emits the light, the other is connected to a very fine
wire leading to the top of the substrate. The one leading to the base is
the cathode (-), the other is the anode (+).

--

Christian Schmadalla (st000328@hrz1.hrz.tu-darmstadt.de)
http://www.tu-darmstadt.de/~st000328/index.html (Deutsch)
http://www.geocities.com/TimesSquare/1350/index.html (English)

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