Nice page Stef. I believe there is a typo under "Extended Matrix Switch (2)" in the table for "full IO signals for 1 x 1" at the intersection of S2 and Bout. "high" should be over "0" rather than under. May I use your graphics and descriptions for the Matrix keyboards on PICList.com at: http://www.piclist.com/techref/microchip/keymatrix.htm ? -- James. -----Original Message----- stef mientki Sent: Wednesday, November 28, 2007 15:15 maybe this give you some ideas: http://oase.uci.kun.nl/~mientki/data_www/pic/projects/pic_switch.html cheers, Stef -- 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