In-Reply-To: Soren Knudsen wrote: > Yes as you all figured out i have found, after looking at my keyboard, that > its just to switches that has been used. Now all have to find out is how to > connect this thing to a pic. The 98 switches (49 notes) is all connected to > the same source (i figure its +5V and then in some way connected to a > processor). There is a diode for every key too. There is only 24 pins > connected to the processor board and one of them is carrying +5V. How can > this be done? Do any of you have an idea? Are you sure all the switches connect to one common line? If there are diodes I would expect to see the switches wired in a matrix. Brian Gregory. briang@cix.co.uk -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.