Questions tagged [theremin]
Electronic music instrument that is played without physical contact
12 questions
7
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2
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Single oscillator theremin?
I read that the pitch circuitry of a theremin mixes two RF oscillators, and their difference creates the audio frequency produced by the instrument.
The theremin has inside it three radio-frequency ...
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0
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I am making a theremin-like circuit using a 555 timer and an LM386 amplifier chip. It’s currently not outputting any sound. Why is it not working?
This is the 555 timer circuit that I am using:
This is the LM386 circuit I am using:
I have connected the output of the 555 timer to the 10k potentiometer.
If I connect the 555 timer part of the ...
- 21
0
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1
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46
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Finding Diff Eqs for Variable Square Wave Oscillator of Theremin
For a project, I built a theremin using an LM311N as the basis for my fixed and variable oscillators. I wanted to find the period of the variable oscillator by finding the systems of diff eqs ...
- 15
0
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0
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63
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People detection in large rooms using antennas
After coming across a 2004 installation by Carsten Nicolai titled "anti" where he used a theremin as an element for presence sensing, I was wondering if this principle could be extended to ...
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0
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2
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316
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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 ...
- 13
0
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1
answer
168
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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 ...
0
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2
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794
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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 ...
- 223
5
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3
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992
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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
1
answer
739
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'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 ...
- 121
0
votes
1
answer
268
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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
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2
answers
2k
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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 ...
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5
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3
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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", ...
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