Tom=E1s =D3 h=C9ilidhe wrote:
> =

> The largest display multiplexer I've ever done that actually looked
> good
> (i.e. it was nice and bright and had no observable flicker) had 16
> stages (i.e. 16 individual LED's).
> =

> Have you any idea what the "maximum" amount of stages is? Would it be
> possible to make a multiplexer that has 42 stages? I'm using the
> PIC16F887 to orchestrate the display multiplexer. If I want to pull
> this
> off, should I definitely run the PIC at 20 MHz?

The limitation won't be the '887.

You want to multiplex the LEDs in your Connect4, right?  If you multiplex
the LEDs singly (but I'm not sure how you'd practically wire this, but
anyway...), each will only be lit for 1/42 of the time.  So - will they
still be bright enough, with your current source?  That's the limitation...


David Meiklejohn
www.gooligum.com.au



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