Please read the description first for more relevant information. Next video (20 jan. 2025) where a 6 MC crystal was used (very precise) is here:
https://youtu.be/D2kUc_aA-_g?si=shxJUlB7ueHUtEbW
In the showed circuit/setup you can measure the weight of substances values below 1 gram.
The principle is very simple.
The weigh plate is connected to a strip of very thin aluminum, made of say a cola can. It must be sloppy and flexible enough, thus not sturdy.
At the underside of the “weigh plate” (put at the end of that stip of aluminum) is a tiny ferrite rod that moves inside the core of an oscillator in the low frequency range.
Thus: around 500 KC. When a tiny piece of substance of whatever kind is put on the “weigh plate” (that plate must be made of thin plastic or so, must be very lightweight, of course) the ferrite rod moves further into the core of the coil of the oscillator, with the effect that the frequency goes down.
There is a direct relation between the frequency showed on the frequency counter and the weight of the substance, measured. I am sure it can work in the MicroGram range.
Of course you need calibrated “weights” in that range (below 1 gram) to calibrate this Micro Balance. They will all give a certain frequency in this frequency range (the 500 KC range, with this type of oscillator).
Demo of the principle is here (3 july 2024)
https://youtu.be/cz2CCJg-Uz4?si=l8E1XmSjAegAyoqy
In the description there you will find more links to the used oscillator
Like here (2 june 2024) https://youtu.be/bPWmfAGgUKg?si=-Xkpj91CcYkY20Ir
and https://youtu.be/bPWmfAGgUKg?si=-yCf07tNDGZfPg6X
The whole idea can, of course, be eleborated more and engineers in digital technology (not my cup of tea) can perhaps work further with this setup, especially find a better way to translate frequency “X” to a “zero” (read: calibration) and working out the scaling of the milli- or even micrograms.
Has also to do with the properties of a “spring” (here that alu-strip) and its linearity and torsion properties when that piece of metal (alu or another metal) is bowed to a certain position. So a lot to study and to experiment. This is the first idea.
My You Tube channel trailer is here:
https://youtu.be/xbgQ8T3oqh4?si=Ed6QVT0EOmzJoVKX
Set, when you look at my video's, them to the highest resolution (1060 p or so), because YT/Google sometimes wants them to play standard on 360 p. Kind of hindering. 14 jan 2025.
When you search, search always “NEWEST FIRST” to get the right overview. You can also search via the “looking glass” on my Channel trailer via keywords like ”audio”, “radio”, “amplifier”, “filter”, “Shortwave”, “transistor”, “FET”, “oscillator”, “generator”, “switch”, “schmitt trigger” etc; so the electronic subject you are interested in.
My books about electronics & analog radio technology are available via the website of "LULU”, search for author “Ko Tilman” there. https://www.lulu.com/search?adult_aud... I keep all my YT videos constant actual, so the original video’s with the most recent information are always on YouTube.
Search there, and avoid my circuits that are republished, re-arranged, re-edited on other websites, giving not probable re-wiring, etc. Some persons try to find gold via my circuits. I take distance from all these fake claims. I cannot help that these things happen.
NB: the advertisements showed when you look at my video's don't have anything to do with the content of my YT videos. When you see advertisements for certain electronic or electrical things, I do not support them. Especially: do not fall into the trap of "home batteries" advertisements, telling off-grid stories. Calculate it first. Don’t spend thousands of Euro’s/Dollars in a “Solar/Home Battery installation" with its complex electronics in a situation where 1 KwH costs (say) 15-25 cents or so. Our Governments are responsible for cheap energy, it is not a private problem to solve, though many enterprises tell you that story.
Upload 12 jan. 2025 Update 16 jan. 2025.