A number of short lines of varying length are attached to a main line. One contact is placed on the main line, the other is moved up and down, perpendicular to the short lines; the spacing between the lines creates a rhythm + changes in pitch. The contacts easily connect the circuit through the graphite without alot of pressure. A problem may be wearing away of the graphite lines after repetitive use.
Here is a video of the effect:
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2 comments:
how does it work?
what kind of equipment do you require?
This looks fantasic!
I'm a teacher of visual commuinication and drawing at the Univerity of Linnéaus in Sweden.
I would like my students to draw like this.
Help me!
Hey above can't find a way to get a hold of you...
I built an optical theremin circuit like this one:
http://www.instructables.com/id/How-To-Build-An-Optical-Theremin/
then i removed the 2 photocells (Q1 & Q2) and connected one wire to the graphite drawing, and the other would freely move around the drawing. Depending on line weight and distance the tone changes. The graphite replaces the photocells and becomes the resistor in this circuit. Hope this helps...
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