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Build An Optical Theremin

The Theremin That Uses Light

An Instructables by Sacred

Instructables Logo A theremin is an instrument that can be played without being touched. Theremins use antennas and oscillators to sense a person's hand and generate a tone. This Instuctable by Sacred will be designed using light instead. Because of this, it is not an actual theremin, it just uses similar principles.


A Real Theremin


Original Optical Theremin The Original Optical Theremin


Step 1: Gather Materials

Qty.
Part Description Manufacturer Part Number
2
Phototransistors UT1893-91-0125-R
1
TLC555 Timer IC TLC555CP
1
.047µF Capacitor DC.047B
1
100µF Capacitor RA100/16-R
1
1MΩ Resistor CF1/4W105JRC
1
10kΩ Resistor CF1/4W103JRC
1
Battery Pack (to fit 4 AA) SBH-341-1AS-R
4
AA Batteries ALK AA (EN91)
1
Hook-up Wire #9313-0-R
1
Breadboard WBU-301-R
1
Small Speaker KWT2340F12L-2E
1
Wire Stripper JE-2022C-R


Step 2: Putting it Together

This is a really easy circuit to build. Just follow the directions. This image came from Instructables.com.

RS Optical Theremin

Step 3: The Finished Product

At this point in the game, everything should be working. Congratulations on the build, have fun with it!

Optical Theremin


Click here to view the thermin project.
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