At 05:07 PM 6/25/97 -0500, Tom Coonan wrote:
[snip]

>If an LED is hooked to 5V via a 470ohm resistor (a typical value, I think),
>it is
>drawing about 5/470 = 11mA and is bright enough to see.  PICs can drive
>20mA, and can directly drive LEDs, but I think EPROMs don't have as hefty
[snip]

   Tom, sorry to `but-in' here but you need to look at the voltage drop across
the LED. I've seen many designs, especially with optoisolators, fail. With
most LEDs the forward voltage drop is around 1.5 to 2V and varies with the
current.

   - Tom