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When I say it didn't go well, I mean it was a horrible approximation of a sine wave from the arduino, and the PIC did it fairly adequately.
Without more details about what exactly you were trying to do it's hard to say, but assuming you were using PWM, both micros have hardware PWM peripherals that should be more than adequate for this with a simple analog filter.
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You know, I just don't remember. Sorry for lack of details. We were trying to get it done without peripherals for fun using the D/A Analog out on the PIC and it worked ok. Boy now I need to go back and check my work. Its been a few years. To be fair, that was the only drawback
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I've never used PICs with built-in DACs. But for low frequency (how low?) using PWM would significantly broaden the selection of micros you can use and should give adequate performance.
End of conversation
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