After all the money you spend on a single switch, you can probably afford another $1 for a PIC12F microcontroller. 24x36 pixels is only 108 bytes. You can fit that into RAM on the larger 12F. -Adam On 9/27/06, Howard Winter wrote: > Dave, > > On Wed, 27 Sep 2006 11:59:21 -0400, David VanHorn wrote: > > > > > > > Whatever happened to those switches that had a dot-matrix LCD display on > > > the top? > > > > > > NKK smartswitches. Introduced in the 80's, VERY expensive, at $40/switch. > > That's the ones! I bought a couple of samples to play with, then realised that you had to keep them refreshed, and lost interest. If you could have > just sent them an image and they'd keep it displayed until changed, they would have been much more useful. Shame! They're still in their box > somewhere in my deep-litter filing system... > > > I've done driver code for them in the AVR > > How many could you run at once - more than one? If you need a processor per button it goes from VERY expensive to ridiculous! :-) > > Cheers, > > > Howard Winter > St.Albans, England > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist