In this app, a single column output from the PIC will be connected to the 
gates of 2 mosfets -- one P-channel and one N-channel.  The appropriate LED 
digit will be selected by the high or low state on that output pin.

Cheers,
-Neil.



On Monday 12 September 2005 10:51 pm, William "Chops" Westfield scribbled:
> On Sep 12, 2005, at 1:16 PM, Spehro Pefhany wrote:
> >> Looking for a suitable one of these.  Application will be to have a
> >> PIC
> >> output pin drive an LED display column (up to 200mA).
>
> Interestingly, the LED display example on piclist James pointed me at in
> reply to MY question had N-channel MOSFETs in that position (yeah, even
> with common anode LEDs.)  I guess you can more-or-less guarantee Vsource
> (LEDs being non-resistive), so you can ensure enough Vgs for that to
> work?
>
> http://www.piclist.com/techref/io/led/8x7s8pin.htm
>
> BillW


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