At 12:28 PM 4/19/2007, you wrote: >Hi! > >This is my first post, so hello to everyone on the list... > >I need to run a bargraph display from a PIC (exact type to be decided, but I >have a range of 16F and a couple of 18F devices lying around). >The trouble is that due to space constraints, Im not really able to squeeze >a 40 pin device in to the assembly and I dont have many GPIO lines left >over... > >So my intention was to use a serial to parallel shift register to give me >the required outs from a couple of pins. Trouble is that it seems only 8 bit >SRs are common now (and the level meters / bargraph displays are all 10 >part) so I was wondering how other people have done this. > >I tried looking through the archives, but I couldnt find anything where the >designer has adopted this approach. > >EK Try using the maxim 7219 led driver. It has a serial interface and has 64 outputs . It also does away with the need to put a current limiting resistor on each led. http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1339 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist