If you are looking for a way of decoding touch tones, I suggest using the 8870 chip available from BG micro in Texas. It is a very simple to use 18 pin DIP chip and converts touch tones from a telephone or receiving radio into a 4 bit binary code. I use it for remote control projects. It works flawlessly every time! It only needs about 5 extra components such as resistors, a crystal oscillator and a few capacitors. Speaking of which, I need help on another project. Please see my posted question I left on 7-15-2006 under the user name "Madscientist". I am brand new to this site.

Darren