what's a frequency.. it's just some hig and low pulse of a certain length.
  1. Now you should know how to calculate the frequency period? This gives you some info about how much time the pulse will be high, then low
  2. Easy to use Keypad routine, just plug it into your code and enjoy!

    Matrix Keypad routine - Read this
    http://www.picbasic.co.uk/forum/showthread.php?t=3250

    But download the latest version bellow
    http://www.picbasic.co.uk/forum/atta...2&d=1181850086