>>In the output area I see several ULN200x-s applied. To me it seems >>more obvious to use ULN2803/4 with 8 ports each to 'see' also the >>8th port of the register. Allows the use of the decimal point of >>7-segment displays (as extra boolean indicator), and the use of >>eight discrete LEDs. > >Fair enough. Will look into getting those. Hmm, found them on the On Semiconductor site, but they only come as an 18 pin DIP. Would prefer an SM version for size/space reasons. Anyone any ideas? I am in the process of coming up with a bulleted set of lists of what components I suggest we use, and various other bits and pieces, for comment from people. At this stage I suggest that the PC host interface program be written in Delphi, so it is easily ported to *nix by using Kylix. Development software for the PIC may need to be a GNU assembler or compiler unless we can persuade Microchip to supply copies of their CDROM, but the problem I see with that is the Microchip software would be Windows only, where the GNU software has a reasonable chance of being ported to both platforms. Whichever happens, someone will be needed to write the host interface software. Comments welcome. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu