This is my first recased circuitbend instrument.
Originally it was an oval "Animal Sounds" toy, with eight
animals that sat in wells and popped up, when you played the keyboard.
Mechanically the keyboard was so lousy, that it was unusable. Instead
I recased the circuitboard in a project case from a long abandoned
"electronic drumkit". Besides the animal sounds the toy
also had a boring organ sound that I didn't implement.
(Click the picture to toggle between the unbent
Animal Sounds toy and The Green Box)
Pitch/speed control: A pitchcontrolling resitor has
been replaced with a potentiometer. Variable over a very large range.
LDR pitch bend: A lightdependent resistor (LDR) is
placed under the red dome of an old controlboard lamp-cover. Switchable
on or off by the three position switch that is also the on/off switch.
Pushbuttons: The eight pushbuttons activates the animal
sounds. They are placed in a pattern that (at laest theoretically)
should suit a playingstyle, where the right hands thumb works the
pitch/speed dial, and the buttons are played with the other four
LFO. A squarewave oscillator based on a NE555
IC that modulates pitch/speed. Fitted with an on/off switch, two
potentimeters for LFO speed and modulation depth, and a speed indicator
Line out. A jack socket with a speaker/line-out
select switch. The speaker is placed on the left side of the box.