How to make a function generator with variable duty cycle..

[richcj10]

I was thinking of using the Tone() fcn of Arduino but can't find out how to alter the duty cycle...
Any suggestions?

Thanks,

rick

[mwhooker]

You need the arduino duo which can call http://arduino.cc/en/Reference/AnalogWriteResolution

tone() by definition has a 50% duty cycle.

See this article http://arduino.cc/en/Tutorial/DueSimpleWaveformGenerator

[Six_Shooter]

You need the arduino duo which can call http://arduino.cc/en/Reference/AnalogWriteResolution

tone() by definition has a 50% duty cycle.

See this article http://arduino.cc/en/Tutorial/DueSimpleWaveformGenerator

Am I reading that right, the maximum frequency is 170 Hz? That's not very useful as a function generator. There are tutorials for the Uno that will go to at least 20 kHz, I think I've come across one that will go to 100 kHz.

[BravoV]

See the date of the first post. 

[dannyf]

Two options:
- use analogwrite.
- use hardware pwm.