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PB701 Electric Intonarumori

That noise board is based on a design by Urs Gaudenz from Gaudi Labs and from the Schweizer Gesellschaft Für Mechatronische Kunst - thanks for that!
I added the voltage control and some extra functions, like the noise on/off the boost and the mute function to the circuit.

The Electric Intonarumori has an audio an an control voltage input, while building the board one has to choose between bus 1 and bus 2 for the audio input and the other bus for the control input.

The board is named after the instrument “Intonarumori” of the Italian Futurist, painter, composer and the author of the manifesto The Art of Noises, Luigi Russolo.


Schematic


Thanks to Taymur Streng for the reverse engineering of the circuit, I never manged to make any schematics of it.


Paper PCB

Parts

  • Resistors:
  • 1x 330 Ohm
  • 1x 220 Ohm
  • 1x 1 kOhm
  • 5x 2 kOhm
  • 1x 4,7 kOhm
  • 1x 5,6 kOhm
  • 1x 20 kOhm
  • Capacitors:
  • 1x 1 nF (foil)
  • 1x 4.7 nF (foil)
  • 1x 39 nF (Foil)
  • 5x 100 nF (foil)
  • Electrolytic Capacitors:
  • 1x 4,7 µF
  • 1x 10 µF
  • 1x 47 µF
  • Semiconductors:
  • digital delay PT 2399
  • optocoupler TLP521
  • 1x LED
  • Mechanical:
  • 1x IC socket, 16 pin
  • 1x IC socket, 4 pin
  • 1x pin strip 1×9
  • 2x pin header, female 90° 1×3, 1×2
  • 2x pin header, male 90° 1×3, 1×2
  • 3x mini switch
  • 3x push button
  • 3x jumpers
  • Potentiometers:
  • 2x 10k
  • 1x 100k