> I=B9m doing led dies

As someone else suggested a fast-running clock will give you
random output on the dice. I've seen a couple of electronic
dice projects in magazines that do it this way. The dice are
driven 1 - 6 at high speed (no micro, just an oscillator) and it's
purely chance what number is showing when you push a button

However, you did also ask about external input. I've had to do this
very recently to generate large random numbers and used white
noise

http://home.clear.net.nz/pages/joecolquitt/white_noise.html

This little snippet of code may not make a lot of sense out of contex=
t
but what it basically does is to read the timer low byte after a rand=
om
delay (caused by noise transitions on a port pin). The timer low byte
read after this delay then becomes the random number used in the
rest of the code. It appears so far to produce unpredictable randomne=
ss

I'm pretty sure you don't need to go to these lengths as you're deali=
ng
with a restricted range of numbers

;=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

rndlo call    noise
          movf    tmr1l,w       ;get timer low byte after random dela=
y
          movwf   lo

         btfss   high_eqlm    ;test addlow if hi=3Dcnt2
         goto    rnd_th           ;else keep it

         movlw   0x01           ;comparison for range limit
         addwf   cnt1,w
         subwf   lo,w
         btfsc   carry
         goto    rndlo            ;re-generate until lo < cnt1+1

=2E......  rest of code
;-----------

noise movf   tmr1l,w       ;loop anywhere from 0x08 to 0x17 times
          andlw  0x0f
          addlw  0x08
          movwf  index
t_rnd btfss  noise         ;count noise L > H > L transitions
          goto   $-1
          nop
          btfsc  noise
          goto   $-1
          decfsz index,f
          goto   t_rnd
          return

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