My design finally works!

[Pep_T]

Take a look at its behavior on this video. It shows how it works as today.

I am starting to encounter a few problems:

1. Temperature derating: the detector needs recalibration every 5minutes or so
2. Noise in the test room and presence of metal everywhere

But I am still happy with the results.

[Pep_T]

As promised, here's the GitHub repository where you can find the code for the STM32 and the KiCad files.
It is constantly being updated, so do not expect to remain the same, it will change day by day.

I am now working on a self-calibration procedure at power up and in the meantime I built a simple structure to hold it properly.

Tomorrow I will perform the first ever test on ground.

https://github.com/GiuseppeTrainiti/MetalDetector

[Pep_T]

I need your help with this one guys.
It appears that anything solid makes the detector scream. It is like there is no shielding, even tho i connected the shield (the white wire on the coil calbe) to GND.
Even my hand makes it beep. I am afraid that the ground test of tomorrow will fail if I don't get this right.