Hello Declan, If you can�t use 8x8 matrix control, then a serial approach it�s the way to go. It�s a good idea to use PC for remote control and has the advantage of flexibility and spare you the effort of building a remote transmitter. If I remember correct I saw this in Electronique Pratique magazine. They use a simple long serial register with a lot of parallel outputs. I�ll check this article when I get home if you are interested.
Regards, Mircea Coman --- Declan Moriarty <[EMAIL PROTECTED]> wrote: > I have a need to switch a 64 way exhibition piece in > an 8 x 8 matrix. We are > farting about here to impress. The output stage I > can manage. It's the > control strategy I am wondering about. Due to design > considerations I cannot > multiplex outputs, so driving with 16 switches (8 > columns and 8 rows) isn't > practical . > > It has to be controllable by a demonstrator, and > they're not printing > characters or any standard shape; what is wanted is > an efficient and humanly > usable interface to address these. I looked at > remote control ics, but the > interface is too well integrated into a tv. Ditto > serial connections. I > haven't multiplied out the combinations, but it is > daunting(zillions). There > will be a pic(16f877) based pcb I can attack and > alter if needs be, but my > coding skills are primitive. Mind you, the pic16f877 > isn't. > > The very basic would be addressing the cells > individually via a pc & serial > port. Anyone got a better plan? > > > -- > Regards, > > > Declan Moriarty > > > > > Applied Researches - Ireland's Foremost Electronic > Hardware Genius > > A Slightly Serious(TM) Company > > Experience is like a comb, > that Life gives you - AFTER all your hair has fallen > out! > -- > Author: Declan Moriarty > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 > http://www.fatcity.com > San Diego, California -- Mailing list and web > hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an > E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > the message BODY, include a line containing: UNSUB > CHIPDIR-L > (or the name of mailing list you want to be removed > from). You may > also send the HELP command for other information > (like subscribing). __________________________________________________ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com -- Author: Mircea Coman INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
