The topside of the device; the piano wire contacts are kept close to the drawing surface as its is moved.
The underside of the device; the speaker.
Here is a video of how it functions + sounds:
The underside of the device; the speaker.
The drawing surface
Multiple drawing devices suspended from above onto the vertical drawing surface (or placed on a horizontal surface). The devices are able to move around the surface creating + distrupting circuits.
This device uses a fan to turn a propeller which make a wire bounce upward. The bouncing wire makes contact with another wire closing a simple LED circuit momentarily. The LED flickers on/off rapidly; this light is sensed by the phototransistor of the optical theremin creating a pulsing/laser-like sound. The fan will use a magnetic contact as a switch; where the magnet is used to adhere the contact to the drawing surface.
The drawing surface + mounting surface is suspending from above leaving approx. 8-12" space between the board + the wall. This space will be used to arrange the sound + movement components. The mounting surface may be metal to allow magnetic contacts to be held in place to control devices/components that produce repetitive beats/sounds, such as a cooling fan, etc. Moving the magnetic contacts from contact point to contact point could activate other similar components The drawing surface will be made of heavy graphite lines acting as resistors for LEDs and other sound operated devices; these devices will be operated by another set of contacts.
I've looked at the lengths of the graphite lines, it seems that the LED will still light slightly even when the line is 22" long. The lines have to be redrawn to build up graphite; the line can still remain quite thin. I plan on using the story of the Tower of Babel to influence the drawing surface (see the images in the previous posts, Tuesday, Novemeber 14th). This weekend I have booked an overhead projector to help transfer specific aspects of the Tower of Babel paintings to the drawing surface.
The resistance created by the graphite is shared among two LEDs. The greater the resistance the dimmer the light becomes; by placing the contact point closer to one LED makes it brighter and the other dimmer. The light emitted from the LEDs is used to activate the phototransistors of two optical theremins; each produces a tone/sound relative to the quantity of light. These tones begin to vary as the contact is move from place to place. One optical theremin may produced a low pitched tone, while the other produces a high pitched tone. Graphite controlled light is used to produce sound.
Bruehel's Tower of Babel, 1563
'The Confusion of Tongue' Gustave Dore, 1865.
"The idea of making my own tools for artistic expression arose from my desire to give more direct form to the proposition that art is the embodiment of philosophies concerning human behavior. Since the Love Arms are not metaphorical but actual tools with a concrete physical form, they must have volume and weight, decoration, and functions. (As they are musical instruments, they must emit sounds and be attachable to the body, so that a physical and emotional 'performance' can be given.)
"In the same way as Love Arm 2, install 'Disco Ball Arm' with a special strap. The special feature of it is a pear shaped mirror ball with a diameter of 180 mm. A Makita 9.6 V drill painted with wood grain texture and an Ibanez electric guitar pickup is mounted on a 16 mm silver metal plated steel pipe and out puts 'Real machine sound'. The non-stage transmission model drill, together with movement of the disco ball synchronized to the player's direct emotion, enables free expression. Furthermore, by grabbing onto the rotating part and adding load, it squeaks in high tone creating a melody as if someone is sobbing. It is also possible (manually) to flash lights to go with the music. Connecting Makita drill machine, an item essential to rock music as a symbol of speed and power, with a disco ball symbolic to dance music, it is all brought together in a Mods' decorative scooter technique way." - the-rotators.com
"The first Love Arm that can be held in one hand. It weighs approx. 3.5 Kg, equivalent to the normal electric guitar. Rawlings Big Stick baseball bat is used for its basic structure. At the tip is a battery operated flashing light, at the head part a spring unit and battery compartment box, and at the grip end one jack is installed for sound out put. To play Love Arm 4 you can boost up the out-put and just swing, lightly hit the stage or the ceiling, or just throws it when you get on the groove. The vibration of the spring will transform into a sound like crushing rocks or an explosion. It is structured to enjoy feedback sounds different from regular electric guitar sounds by turning up the volume of the amplifier." - the-rotators.com


By giving a device movement; a device is able to then produce sound. A machine with contacts/sensors can move around an area connecting + disconnecting graphite traces. As it moves different sounds are produced, it could also create new graphite lines as it moves. Eventually these line begin to overlap creating new graphite resistors + points of contact.
Some problems arise: the graphite lines have to be consistant + have an appropriate weight. The line works the best when it is drawn dark + wide.
If graphite lines are drawn on a rotating disk, where a contact is placed at the center + another on the inner portions, as it moves different resistances are applied. The sound, caused by the varying resistances, will cycle through and through.
Here is a video of the effect:

"Cartoon by Perrault, France, about 1927: "In 50 Years -- Professor Theremin synthesizing himself, plays the finale of 'Faust' before applauding machines who will henceforth replace the audience at the Opera." Schillinger Theremin Collection, Arthur Friedheim Library, Peabody Institute, Baltimore." Glinksy, 2000.