October 15th, 2008
Gijs Gieskes has made many wonderful machines from gameboys or other machines which he’s circuitbent.
He writes about the Acid Machine:
The circle with the lines that you see on the top of the machine, rotates and displays the note you are playing.
When you play a C the lines in the middle circle will be standing still.. from the C it will go outward, displaying all notes on a keyboard in 12 steps.It works by making a LED blink in the frequency of the sound, and rotating the image at a set speed.
more information here
(thanks, kevin!)
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