Wednesday, October 11, 2006

The phototransistor of the optical theremin

The phototransistor will sense the amount of light at a given moment in the space. If the quantity of light reaches a given level it will trigger a solenoid to open or close an air valve. ie: When the phototransistor senses a high level of light it will trigger the solenoid to open, which allows one of the chambers in the pneumatic structure to fill with air. If the light level changes the solenoid will close and another will open, filling a different chamber of the pneumatic structure.

The phototransistor determines which chambers of the pneumatic structure are filled with air. Changing level of light, within the space, will cause the pneumatic structure to move back and forth. These movements will trigger the switches + sensors of the other device, therefore activating them.

The original optical theremin can be attached to the structure as a type of noise/sound maker.

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