Today we start with each of the four working groups presenting their ideas, and what they can offer in relation to input/output as control elements to the other groups.
(photos by Romunde, click on them to see them bigger)
Group 1: Musical box
They are working on trying to get a motor to turn the handle of a little musical box (grinder style). Problems related to this are to find the correct motor (step motor with gears) and how to attach the rotation head of the motor to the musical box handle. Other ideas concern the use of other sound making instruments and devices.
Group 2: The weather group
This group have been using a wind sensor to get a piezo sensor to sing inside a paper coffee cup speaker. A fan provides the wind. The weather sensor sense data to the Arduino board. The microcontroller converts the data from the sensor to alter the sound frequency of the piezo sensor.
They have also come up with another idea of using a mouse running on its wheel to drive a motor. Using a magnet switch, they plan to track the speed of the fan and send this data to a piezo sensor to create sound in a similar manner to the first group.
Group 3: The contemporary music machine
Also stuck on the piezo sensor, this group have attached a vibration motor taken out of a mobile phone. The piezo sensor is used as a sender. It triggers MIDI notes in max/msp which then plays random piano notes. The signals are sent back to the vibration motor as the piano plays, causing the whole Arduino board, the sensors and the cables to shiver.
Group 4 (läuft): The Element-paper-machine (EPM)
A heating element from a kettle is mounted on a vertical board along with a paper roller. A flex sensor fixed to a piece of paper uses data when the paper is wafted to turn the heating element on and off at defined thresholds. When the heat is turned on a light bulb is illuminated. As the paper roller feeds paper between the rods of the heating element it burns the paper, creating barcode-like brown lines on it. The group plan to track the paper and the lines drawn on it with a webcam and max/map, and use this to create sound. One of the challenges is to get the system stable. During their demonstration the paper caught fire several times! Another will be to tackle the changing light conditions in relation to video tracking. See it in action here.
After lunch ideas are launched about the showing on Friday. A decision has been made from above (HC and me) to move the showing from our small studio to the large project room on the floor below. This will happen on Thursday, when attention to the spacial aspects of the integrated machines must be focused on. By Thursday evening everything must be completed and all the dots connected. Some questions are:
Should it be an automated machine?
Should it run like a domino effect with a clear start and finish, with a consequence that is irreversible?
Should it run in a loop?
If so, how can there be variations in the loop?
Can things be added/subtracted to the loop while the whole machine is running?
Should visitors be able to intervene?
Should particpants be able to intervene?