This is amazing man. Keep up the great work! I have never heard of measuring weight with hz and stuff!
@radiofun232
2 ай бұрын
Thanks.
@benryves
2 ай бұрын
Very interesting experiment. :) I wonder if it would be sensitive enough to act as a crude microphone for FM transmission? (It kind of already is, but at a higher frequency so it could be picked up by a regular FM radio?)
@radiofun232
2 ай бұрын
You can make a FM oscillator/transmitter in the (say) 88-108 MC band, say with 1 transistor. Many circuits of that are on YT. I don't publish them, b.t.w. for many reasons. In that case you must use a microphone that can generate audio frequencies in the 400 Hz-12 KC band. And for FM you must find a way to modulate that audio signal into the 80 MC-110MC FM band HF transistor oscillator, via frequency modulation. But you are completely correct when you say that, in this case, we are talking about FM (Frequency modulation) of the wave, caused by the changing magnetic field in the oscillator circuit, giving it other frequencies, related to the weight of a certain substance, placed upon the alu spring/plate, most sensitive of course when placed on its max. lenghth. Thanks. 3 July 2024.
@BjornV78
2 ай бұрын
Nice experiment Ko, this effect on the scope almost looks like a reverb sound effect. Another idea with this experiment, is to lower the frequency and rectified the AC into a DC signal and use a analog voltmeter as output, then you have a very sensitive scale. Don't know how linear it will be offcourse. Also with a lower frequency (audible range), you can hear the bouncing of the aluminium plate and you get the reverb sound effect. Grtz
@radiofun232
2 ай бұрын
Thanks Bjorn, we need of course in that case a frequency to voltage converter, that works in this small frequency range (say 100 KC wide), but that is of course possible. With (say) some experiments...
@johnwynne-qx6br
2 ай бұрын
Very interesting experiment. Thumb 👍
@radiofun232
2 ай бұрын
Thanks.
@ocayaro
2 ай бұрын
You should instead use a linear variable differential transformer (LVDT) concept coils for better accuracy and performance.
@roncaruso931
2 ай бұрын
Interesting. Thanks.
@radiofun232
2 ай бұрын
Thanks Ron.
@AllAmericanFiveRadio
2 ай бұрын
Ko, this is a Very interesting idea and video. With a few modifications, bysides weight, a temperature gage, or barometric gage may be possible. Thank for posting!
@radiofun232
2 ай бұрын
Thanks Richard, much appreciated! Yes, I had to wind the coil at the "top" of the paper tube, to get as much frequency deviation as I wanted/needed. It is all analog, but people in the digital field will surely know how to (say) write a program for such a (broad) application, not my cup of tea...3 July 2024.
@ornithopterindia
2 ай бұрын
👍Thank you sir.
@AaronALAI
2 ай бұрын
Very interesting, I wonder if you can infer temperature as well.
@radiofun232
2 ай бұрын
Sure, especially ceramic capacitors (in the oscillator) are very temperature sensitive.
@hobbyrob313
2 ай бұрын
Hallo Ko, Ik geloof dat ze dit ook tegenwoordig gebruiken toch? Zo iets? Ik dacht eerst ff dat je een ouderwetse een kanaals RC besturing had gemaakt! LOL VrGr Rob
@radiofun232
2 ай бұрын
Ja, er zijn weegschalen gemaakt m.b.v. luidsprekertjes. Die van die 1 kanaals RC besturing is leuk! Heb daar nog oude boekjes van....Toen ik aan modelbouw van vliegtuigjes deed, in de jaren '60 en '70. 7 Juli 2024.
@proffessasvids
2 ай бұрын
Brilliant! Xx
@windshield11
2 ай бұрын
It's a bit of a Theremin 😊
@ivolol
2 ай бұрын
Sensitive, but is it stable over time?
@radiofun232
2 ай бұрын
It is an experiment. It depends on the way it is used.
@radiofun232
2 ай бұрын
There are 3 stability "things": a) does the spring, in this case an alu plate, return to its exact position after weighing a substance b) the stabilty of the oscillator and c) the stability of the frequency counter. Issue c: it is stable up to 1/1000 of a second, thus no problem. Issue a): depends on the quality of the materials and, of course, not overloading when weighing a substance. Perhaps with a knob via a tiny push mechanism a zero-reset can be made. b): the stability of the oscillator depends on the temperature + the quality of the components + the way that it has to be made: sturdy and on a stiff board. When all these things are fulfilled my idea is that it will be quite stable over time. Thanks. 7 July 2024.
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