On Wed, 15 Feb 2006 23:30:19 GMT, "Anthony Fremont"
Gave us:


"Roy L. Fuchs" wrote in message
.. .
On Wed, 15 Feb 2006 17:46:25 GMT, "Anthony Fremont"
Gave us:

If the OP finds an LED with a lower voltage drop than the original,
then
it will most assuredly have more current flowing thru it with no
changes
to the rest of the circuitry.

The current fed to LEDs is typically controlled and limited for a
reason. There is no reason for you to be correct if said circuit is
one such regulated circuit.

If the current limiting is done with a resistor, as it often is, then
the resistor would be forced to drop more voltage. This means more
current thru the resistor and consequently more current thru the diode.

Also, single junction diodes such as that discussed here have
changed very little over the DECADES. The junction threshold voltage
hasn't changed much at all. Do you have any examples?

Then please tell me how an LED can now be blindingly bright with 20mA if
they aren't more efficient? They're a far cry from the things of
yesteryear. Examples abound, traffic lights, tiny flashlights etc....


The discussion is about NON visible spectrum LEDs and no, IR remotes
do NOT "typically use a resistor" for the current limiting, it is a
controlled, driven circuit.

There has been no reason for IR LED makers to make versions that are
like those of the visible spectrum arena, which is far more diverse,
and has far more applications being addressed. That is why "high
brightness" versions even ever came to be. It called demand. There
has been no demand for making communications IR LEDs any more powerful
than they are, though I am sure some are out there, one poster
mentions buying an entire new unit and pulling the LED from it. It
would likely be cheaper than digging one up somewhere.

How much is one's time worth?