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The analogWrite() function is used to generate a PWM (Pulse Width Modulation) output signal on compatible pins.

3 votes

Is it possible to make a mathematical function generator using Arduino?

You can generate arbitrary waveforms using either the built-in PWM and a low-pass filter or an external DAC. You won't get more than 16-bits in PWM ( or AFAIK non-audio DAC with arduino libraries ), …
Pete Kirkham's user avatar