Themenwox

Here is a toy my father, a radio amateur, was soldering. What is this tricky device? This is a theremin. A bit of history, of course, needs to be told. The first theremin was created in 1908 by the Russian scientist and musician Termen, from which he got his name. The principle of operation is simple: depending on the light, the device makes peculiar sounds. Thus, it can be considered the first musical power tool.
Termenvoks do it yourself
 Termenvox with my own hands
What my father did is not really a real thing, it's probably a toy on a photoresistor, but still interesting. This is due to the fact that the sound that is produced at the output is polyphonic, and the Theremin Theremin was monophonic. Making this miracle is not a very complicated device. You only need to go to the nearest radio engineering store and buy all the necessary parts, and the price to be honest is not that high.Or you can disassemble your old Chinese tape recorder, where you will find half the details.
 Termenvoks do it yourself
 Termenvoks do it yourself
For the convenience of soldering and workmanship, it is better to buy a prototype PCB. Just the process of drawing the tracks, and then etching them, will take an indefinite period of time. A ready-made breadboard handkerchief will speed up the process and you will be able to make this device yourself literally in the evening. this is not his own invention, then he worked here on this scheme, and, of course, slightly upgraded it to make the device work better and look modern. Audio output, power on / off button and volume control were added to the device. This device works on the basis of a 555 chip or as it is also called a “timer.”
Termenvoks do it yourself
Termenvoks do it yourself
The pitch modulated with a photoresistor. Everything depends on the lighting of the room. Move your hands to either close the light access to the photoresistor, or open it.This device works from a conventional battery type krone.
Termenvoks do it yourself
 Termenvoks do-it-yourself


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