lighty
Member level 3
schumann resonance/ tesla
I am commissioned by a technical museum and I already did a number of working replicas of the old electrotechnical devices like Tesla coils, Tesla induction motors, Tesla Egg of Columbus, various turbines etc. My current assignment is to represent, in real time, a basic Schumann resonance. The easy way would be to simply make an oscillator at about 7.82Hz and be done with it, but to make things more complicated I'm suppose to do a model of the Earth with the lighted (with stobe light) atmosphere which is suppose to flash in sync with the basic Schumann resonance in real time.
My original idea was to make a large 100,000 coil with laminated core (already done) and then to filter the signal, turn the filtered frequency into a square signal and then simply turn on and off a strobe. Now it seems I forgot all about the noise levels that could make for false triggers. On the other hand if I don't filter the 7.82Hz out then the strobe will be triggered with all kind of garbage and various strain signals and noise.
The second thought was the to filter the frequency out with the DSP. The Spectrum Lab would work fine but it introduces a significant delay (about 10sec for the narrow frequency bandpass filter I originally tried to use) and the audio buffers would add some more (although with the ULF frequency the delay introduced with audio buffers shouldn't be so noticeable and of great consequence).
Now I'm stuck with a creative block. I simply cannot think of a way to synchronize strobe display in real-time with the Schumann resonance frequency. Of course I could use some approximation but that would be cheating of the visitors of the Museum and in disagreement with the contract.
The next idea is to make a loosely stable oscillator at approximately 7.8Hz and somehow (I am not sure how though) couple it to the Schumann resonance frequency filtered by a bandpass filter in order to synchronize it. I'm not sure how to proceed because never before I had to work with such low frequencies and with such concepts as the oscillator synchronization. I do know about the phenomena but I never ever tried to exploit it in any practical way. In fact I couldn't find anything but a lot of theory and no practical ideas whatsoever.
Any help and ideas would be appreciated! 8O
I am commissioned by a technical museum and I already did a number of working replicas of the old electrotechnical devices like Tesla coils, Tesla induction motors, Tesla Egg of Columbus, various turbines etc. My current assignment is to represent, in real time, a basic Schumann resonance. The easy way would be to simply make an oscillator at about 7.82Hz and be done with it, but to make things more complicated I'm suppose to do a model of the Earth with the lighted (with stobe light) atmosphere which is suppose to flash in sync with the basic Schumann resonance in real time.
My original idea was to make a large 100,000 coil with laminated core (already done) and then to filter the signal, turn the filtered frequency into a square signal and then simply turn on and off a strobe. Now it seems I forgot all about the noise levels that could make for false triggers. On the other hand if I don't filter the 7.82Hz out then the strobe will be triggered with all kind of garbage and various strain signals and noise.
The second thought was the to filter the frequency out with the DSP. The Spectrum Lab would work fine but it introduces a significant delay (about 10sec for the narrow frequency bandpass filter I originally tried to use) and the audio buffers would add some more (although with the ULF frequency the delay introduced with audio buffers shouldn't be so noticeable and of great consequence).
Now I'm stuck with a creative block. I simply cannot think of a way to synchronize strobe display in real-time with the Schumann resonance frequency. Of course I could use some approximation but that would be cheating of the visitors of the Museum and in disagreement with the contract.
The next idea is to make a loosely stable oscillator at approximately 7.8Hz and somehow (I am not sure how though) couple it to the Schumann resonance frequency filtered by a bandpass filter in order to synchronize it. I'm not sure how to proceed because never before I had to work with such low frequencies and with such concepts as the oscillator synchronization. I do know about the phenomena but I never ever tried to exploit it in any practical way. In fact I couldn't find anything but a lot of theory and no practical ideas whatsoever.
Any help and ideas would be appreciated! 8O