Quoting "Harry H. Arends" <h.arends@home.nl>:

> Hi there,
>
> Is there a need for a piece of debouncing check on slow moving HALL sensors
> connected to a MCU?
>
> Harry

Probably not. Read the data sheet. If there is built-in hysteresis,  
then no (unless you want to reject noise glitches, which is not really  
debouncing). For example, the  Panasonic DN6849 has minimum 7 (typical  
10) mT of hysteresis.

If there is no built-in hysteresis then mechanical vibration or perhaps
power supply noise could cause a sort of 'chattering'.

Best regards,
Spehro Pefhany
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