First revision: Arduino Control Voltage

The recent holiday brought into my possession a shiny new Arduino Duemilanove board, my first real project with it? Control Voltage output to control my self titled Uranus synthesizer (based on the Voice of Saturn synth). In any case, after a couple long nights I cam up with the sketch bellow, I've tested it and it seems to work with a little adjustment from the pot on the output.

I have yet to attempt at getting the thing tuned, but by runing the PWM output of the Fading sketch (a steady ramp up and down from 1 to 255) i was able to verify that it does indeed control my rather excentric synth. Thoughts, suggestions and critics welcome.

NOTE: The capacitor in the lowpass filter at the bottom is 470 uF, apologies for not adding the value.

Creative Commons License
Arduino Control Voltage by Dana Simmons is licensed under a Creative Commons Attribution-Share Alike 3.0 United States License.
Based on a work at