On 28-Aug-10 22:38, Joseph Bento wrote:
> On Aug 28, 2010, at 7:15 PM, Nathan House wrote:
>
>> I want to use a digital input on my PIC to count the number of steps a
>> stepper motor is taking (pin 2 of a UAF2115 Speedometer IC), but the sig=
nal
>> is 12V and I think the PIC can only take 7.5V.
>>
> My first thought would be to use an optoisolator.  You can source or sink=
 your output to the PIC at whatever you are using for VCC.
>
> Joe
>

     Or just a series resistor feeding a zener diode to ground, in case=20
isolation isn't needed.

     Mark


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