On Wed, 14 Feb 2007 11:38:55 -0600, Chris Friesen
wrote:

Chop Suey wrote:

You do know that LED's must be wired in series with a resistor to make
them glow, right?

I agree that is the proper way to do it.

However, they work just fine by themselves if the voltage supply is low
enough, or if you parallel enough LEDs together.


Essentially false. However if you use a small enough battery you may
be able to use its internal resistance (it cannot supply enough
current to destroy the LED without dropping below the LEDs forward
voltage). You may find this in small, cheap flashlights.

Chris

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"Unlike biological evolution. 'intelligent design' is
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