On 6/15/2008 8:42 AM wkaiser@[EMAIL PROTECTED]
spake thus:
> Dan Merkel <danmerkel@[EMAIL PROTECTED]
> wrote:
>
>> For those of us who are complete novices at LEDs & electronics in
general,
>> can you provide some information as to how one would wire a circuit to
use
>> them? I seem to remember that LEDs have a polarity to them (which is
>> which), how about resistors? This looks interesting but I'm at a total
loss
>> when it comes to even simple things mentioned in the previous two
posts.
>
> I can never remember which lead is + or -. I connect the LED to a 1.5V
> source. If it lights, I have it right. If it doesn't I reverse the
> leads. If it doesn't light then, it's no good.
>
> Connecting the LED to a low voltage source like that won't harm it if
it's
> backwards. It's a diode, after all.
Yep, true that.
In fact, if one is handling a lot of LEDs and wants to identify polarity
quickly, one could build a little testing rig out of a 1.5 volt battery
holder and a couple of wires (color-coded) connected to alligator clips.
--
The best argument against democracy is a five-minute
conversation with the average voter.
- Attributed to Winston Churchill
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