> origianally had problems witht he hall switch bouncing. but i now
> used a relay for the switch to contact

So using the Hall switch to energise a relay has cured the bounce ?
That sounds like the magnetic inertia of the coil is filtering the bounce
noise, the result being that the contacts don't chatter

If that's correct then adding an RC filter to pre-condition the switch
output would help, although not strictly necessary if the s/w can do
as good a job with a delay or polling routine. For example something
like 10k and 100nF would be a starting point. The 10k and 100n
are joined in series. Their junction goes to the PIC pin. The other end
of the resistor goes to the Hall switch, the other end of the capacitor
goes to 0V

http://en.wikipedia.org/wiki/RC_filter

You may need a discharge resistor (say 100k) across the capacitor if
the Hall switch doesn't drive to 0V, as the high impedance of the PIC
pin may not be low enough to discharge the capacitor between switch
pulses

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