Where to begin

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themclush

themclush

Newly Enlightened
Joined
Aug 3, 2004
Messages
4
Location
A very dark place
An utter newbie asks: Is there a reference I can use to learn basic LED electronics? For example, what sort of LED I can use with 2 AA cells, and which is the positive contact on the LED - the long or the short?

Like I said, newbie! Although I do have an almost pristine Maglight that is 25 years old....

Thanks!

Lushie <font color="666666"> </font>
 
H

Hotpockets

Newly Enlightened
Joined
Sep 18, 2003
Messages
74
Can't help much with your question, but WELCOME! /ubbthreads/images/graemlins/smile.gif I'm sure someone will be along to help shortly...
 
The_LED_Museum

The_LED_Museum

*Retired*
Joined
Aug 12, 2000
Messages
19,414
Location
Federal Way WA. USA
A quick suggestion would be to check out the LED FAQ at this link. At very minimum, that should answer at least some of your questions.

The (+) positive lead of a typical LED is the longer of the two leads. This can vary, but not very often.
 
eebowler

eebowler

Flashlight Enthusiast
Joined
Dec 18, 2003
Messages
1,735
Location
Trinidad and Tobago.
You can use red LEDs directly with 2AA cells, however, if you are thinking about which type of white LED, then you will need to find something to step up the voltage to 3.5-4.0V,(Volts)
 
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