Tag Archives: arduino

Pneuma World

Design and programming of hard/firm/software for networked control, sensing, and sequencing of pneumatic sculptures by Chico MacMurtrie at the Muffathalle in Munich.  Each piece has its own Raspberry Pi which handles network communication and runs local control algorithms via an Arduino MEGA with specially designed PCB shields operating the valves and reading the sensors.  Puredata is used to translate UDP network data to/from standard MIDI for master sequencing in Ableton Live through each piece’s custom Max For Live device.

Audio Control Unit

Developed and built for the Tsai Art and Science Foundation, this ACU is an updated version of Tsai’s original design which takes audio input from a microphone and translates it into a control voltage that precisely modulates the frequency of a strobe light synchronized to the RPM of the motor driving a kinetic sculptures.

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An original analog ACU Left, Arduino/analog hybrid Right

After analyzing the original analog CMOS circuits, I developed a hybrid design that employs the same analog input and output stages, but uses an arduino to handle the analysis and timing stages of the circuit for improved range and stability.

 

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Inside the hybrid ACU

Like Tsai’s originals, this version has it’s power supply built in, 1/4″ jacks for the microphone input (which bypasses the built-in microphone) and strobe output, two trimpots for fine adjustment and a large knob for microphone sensitivity.

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Hybrid ACU

 

Drawing Machine

Developed in collaboration with Olafur Elaisson and his studio in Berlin and exhibited at Tanya Bonakdar Gallery, this machine ‘listens’ to two electro-magnetic transducers on either side of a divided string and uses these pitches to drive two phase-locked sine wave oscillators (transposed 12 octaves lower) which regulate the AC voltage across the voice coil actuators pushing and pulling the intersecting arms holding the pen on an X and Y axis while a disc holding the paper slowly rotates and travels from one side of the table to the other.  The ratios generated by the divided string allow the user to extrude Lissajous curves in a continuous spiral.  In addition to the paper drawing, all drawings are recorded to hard disk and can be played back later, for multiple editions of a single drawing.
This video is of the machine in the installation (well, ‘video mode’ on my handheld point-and-shoot camera).