AVR-Chat

--- Sal Brisindi <tubeman59@yahoo.com> wrote:
> Hi All,
> Did anyone here ever write code for a 4 or 6
> multiplexed digit clock
> using a AVR? The MM5314 4/6 digit clock ic is
> getting scarce and
> expensive so I would think a AVR based one would be
> great. I do have
> a bunch of AT90S2313's to play with.
> 
> Thanks,
> Sal Brisindi
> http://www.numitron.com
> 
> PS: I posted this same message in another group
> also.
> 
> 
Hi,
I wrote a program long time ago with 8051 which drives
4 series of 4 7-Segments using a shared data bus and a
de-multiplexer to select each digit. but the only
thing which is important is using 12V for driving
digits and using common-anode types. the refresh speed
was about 64Hz and all done in 1ms timer tick service
routine.

but you can use a series of shift-registers and
directly connect them to digits and save pins and time
and ofcourse money.

reza



		
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