Peter Homann wrote:
>
> Hi,
>
> I'm planning to generate a 0-10V analog voltage using the PIC PWM, RC
> filter, and op-amp.
>
> The question is how do I isolate the output voltage. The voltage is to drive
> a 90V DC motor controller where the controller ground is live.


The smart solution is to isolate a digital
signal, not an analogue one. Get the PIC to
output a digital PWM, through a cheap opto-
coupler, and then filter to analogue with an
RC filter at the receiving end. :o)
-Roman

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