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Questions tagged [theremin]

Electronic music instrument that is played without physical contact

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2answers
87 views

555 timer Theremin - capacitor choice, and question about mixing signals

I'm trying to create 555-timer based Theremin, but I have a few questions that I don't quite understand. For now, I'm building it on a breadboard (yes, I know it's not the best option), but I don't ...
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1answer
68 views

Need help with theremin oscillator

I'm having trouble getting my colpitt's oscillator to give me nice sinusoids. It seems to be clipping the output for for reasons I don't understand. The circuits needs to oscillate at 7MHz (Body ...
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2answers
595 views

Radioshack's theremin circuit - how does this work?

Can anyone explain why this works? What's going on? I built this kit today and it works great, but I don't fully understand what each part is doing. Is the 555 timer being used for pulses or ...
5
votes
3answers
877 views

single-capacitor oscillator choice for digital theremin

Intro One of the pupils puzzled me with a question of building a theremin - a basic musical instrument which has a pitch manipulated by moving the hand around the vertical antenna. Due to specifics ...
2
votes
1answer
436 views

'How/why' does a human act as a capacitor for a theremin?

I've read that a human plays a theremin by acting as a capacitor, or reducing the capacitance of the theremin. What properties of a human make it act this way? Is there any way of reducing/negating ...
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votes
1answer
248 views

FPGA based theremin , is possible?

I remember a while ago , i saw some Digital based Theremins circuits from glasgow university... http://www.theremin.info/-/viewpub/tid/10/pid/65 would it be possible to make a theremin by using an ...
4
votes
2answers
1k views

Might swollen caps be working properly? [closed]

I've seen these two swollen caps in a symmetric +12, 0, -12V power supply. The circuit (a theremin) seems to be working properly, but I don't know if that caps are going to cause damage in the whole ...
5
votes
2answers
1k views

What type of oscillator is this? (Theremin Project. Variable Pitch / LC Oscillator)

I found this oscillator at a Theremin project pdf. I simulated the circuit, and found that the output (left wire) oscillates at 236.5 kHz. This circuit is referred to as "Variable Pitch Oscillator", ...