> -----Original Message----- > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf > Of Vasile Surducan > Sent: 18 November 2009 12:55 > To: Microcontroller discussion list - Public. > Subject: Re: [EE] Help - LED Clock display > > On 11/10/09, Bob Blick wrote: > > On Tue, 10 Nov 2009 10:05:06 -0800, "Vasile Surducan" > > said: > > > BTW, > > > assuming you want to build it from scratch, how many IO pins will be > > > necessary for a > > > 7 seg clock displaying: > > > dd:mm:yyyy hh:mm:ss:tt totaly16 digit > > > where the format displayed is day:month:year > > > hour:minute:second:milisecond > > > > Only one pin if you use extra parts :) But if you want to directly drive > > the display, and also choose a "standard" display you will have 8 > > segments plus as many digit commons as you have digits. So if you really > > need milliseconds, that sounds like 9 digits and that would total 17 > > pins. > > Hi Bob, > > It can be better... > > Vasile You can hard wire the millennium digit at 2 and save a pin, and maybe the century digit if you don't mind making a Y2.1K non-compliant antique! Regards Mike ======================================================================= This e-mail is intended for the person it is addressed to only. The information contained in it may be confidential and/or protected by law. If you are not the intended recipient of this message, you must not make any use of this information, or copy or show it to any person. Please contact us immediately to tell us that you have received this e-mail, and return the original to us. Any use, forwarding, printing or copying of this message is strictly prohibited. No part of this message can be considered a request for goods or services. ======================================================================= -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist