Re: how to connect an LED to PC


ehsjr wrote:
mrdarrett@xxxxxxxxx wrote:
ehsjr wrote:

wills.kingspanama@xxxxxxxxx wrote:

Greetings,
How to connect an LED to the PCs PPI and make it glow by program?
Thanks in advance.


http://www.epanorama.net/circuits/parallel_output.html#circuithow



So if it's 2.6 mA max (data pins to ground), are the 470-ohm resistors
still necessary? (grin)

Michael


Where's you get 470 ohms? That won't limit the current enough.

Ed


I posted a page on my website re: controlling a light bulb by parallel
port:
http://mrdarrett.googlepages.com/blinky

Is a 2 k-ohm resistor big enough? Should I make it larger, just to
stay on the safe side?

Coming soon: PWM motor control via parallel port.

Michael

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