Radio Shack Theremin Box

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Tell me the outer diameter of the Radio Shack speaker for this kit so I can update the design.  I made the box after I lost track of the speaker so this box is designed for a 32mm speaker.  I did add another speaker mount for up to a 52mm diameter speaker like what you can get buying those little amplifier balls at the Dollar Store for $1! I bought a Radio Shack Theremin to play with, to experiment with to see if I could control it with my "RoboGuts™ S.T.E.A.M. Education Program " for another X-Project ... so far not any really good results ... but still the little box makes the Theremin more fun to use.   You can see how I added a LED into the hole above the photoresistor ... I used a 3-color LED, but probably would get better results with a plain white LED.  I'll give that a try when I get one. Experiments to learn how to use Electronic Components, Structured Computer Programming, Phonemes for Speech &Song in any language, and Art. RoboGuts™ Intelligent content for 3D printing, a S.T.E.A.M. Education Program  http://www.r2pv1.com/  Radio Shack Theremin Sirens ThereminTest 02