Hi Brian, I applied first order low pass filter at the output of Msp430. Before filter I generated 100 Hz pure PWM but after filter using I am looking sawtooth on the Dewesoft screen. I used R=47 k ohm and C=22 nF. Cut off frequency is approximately 161 Hz. Why doesn't see sine wave I dont understand.I think I missed some issues. What do you think about my result? Thank you for your help Betul
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