8 Nov
2009
8 Nov
'09
7:22 p.m.
That sketch is playing a tune making square waves of different frequencies. That's not really the same as PWM, which varies the length of the pulse, but the frequency stays constant. There are a few ways to generate a square wave of a given freq. in Pd, if that is your goal. If you want to do it by modeling the Arduino's use of a timer to turn a signal on and off, that might be an interesting exercise. One easier way, though, would be to amplify and clip a sine wave.
[osc~ 440] | [*~ 50] | [clip~ -0.5 0.5]
then if you plug a 50 cent piezo buzzer into the sound card of your $1000 laptop, it will sound just like a $3 avr!
hehe... thanks for your suggestion :)
enrike