[Diy_efi] DIY-WB construction & testing... help

[Gregory A. Parmer]

Absodamnlutely. I wrote that and it's been reviewed, even. Ouch.
I'll gladly make the update as soon as I can figure out exactly
how to reword it. Thank goodness there's only a single LED.

-greg   the #1 Dummy

> Who's website is that anyhow?  Perhaps an update is in order...
>
> Thanks for the info guys,
>   Andrew
>
>
> on 7/19/02 10:41 AM, Scott Campbell at oneslowalltrac at yahoo.com wrote:
>
> > Oops I spoke too soon.
> >
> > The length of the lead, and the position of the flat
> > spot varies between LED manufacturers.  However the
> > Cathode can be identified by holding the LED up to the
> > light.  The larger of terminal inside is the Cathode.
> >
> > Scott.
> >
> > --- Scott Campbell <oneslowalltrac at yahoo.com> wrote:
> >> Hi Andrew,
> >>
> >> As you now know, that description of Anode/Cathode
> >> identification is backward.
> >>
> >> On an LED, the Anode(+) is identified by the longer
> >> lead and/or a flat on the side of the LED.  The
> >> Cathode(-) is the shorter lead.
> >>
> >> (pin 2) Cathode ----|<|---- Anode (pin 1)
> >>
> >> Scott.
> >>
> >> --- Andrew Brownsword <asword at telus.net> wrote:
> >>>>> on 7/18/02 2:27 PM, rr at RRauscher at nni.com
> >> wrote:
> >>> I reversed it and now it works fine.  I had it
> >>> backward because this page
> >>>
> >> http://www.aces.edu/~gparmer/efi/temp/wb/guide.html
> >>> says:
> >>>
> >>> "The cathode (+) is identified by end having the
> >>> stripe , a "+" marking, or
> >>> a longer lead. Also notable is that the LED has a
> >>> flat spot machined on side
> >>> of the lens corresponding to the anode (-). On the
> >>> schematic, the cathode is
> >>> the base of the triangle and the anode is the
> >>> straight bar with the triangle
> >>> pointing at it. Notice that the cathode (+) being
> >>> identified by a stripe is
> >>> a theme repeated on the circuit board (even for
> >>> diodes like the LED which
> >>> are not identified this way). If the leads have
> >>> already been cut on your
> >>> LED, look inside the diode. You'll notice two
> >> hunks
> >>> of metal. The larger is
> >>> the anode."
>
>
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