You could use one 74hc595 per 7 seg display and use only 3 lines from your pic to do the work. Basically consists of shifting out the 10 characters and clocking them into the 595's. Brightness could be controlled via pwm by a simple 555 circuit. Fritz ----- Original Message ----- From: "Nathan Hurst" To: Sent: 10 September, 2002 23:13 Subject: Re: [PIC]: BCD-Decimal and BED-7-Segment ICs with >20 mA drive capability > On Tue, 10 Sep 2002 19:59:08 -0700 > "Brooke Clarke" wrote: > > > Hello: > > > > I would like to make a 10 digit clock using a 16F628. The idea is to use a hex > > to 7-segment decoder like the DM9368 which I think can handle 20 mA and a BCD to > > Decimal converter like the 74HC42 except with more current capability. This way > > all 10 digits can be driven using only 8 I/O pins. > > > > Is there a BCD to Decimal converter IC like the 74HC42 that can handle 20 mA? > > You could buffer it with something like a ULN2804. > > -- > njh > http://www.csse.monash.edu.au/~njh/ > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.