I had only one hour to use in freeCAD , little slope in the learning curve.
Still trying to figure out things about the work with freecad.
For an hour I was in FreeCAD and learning new features as merge project and so on.
Also the BOM made by Paul n , [ https://eu.mouser.com/OrderHistory/OrderDetail.aspx?qs=9C/vjDbyW3Xu7UxxnRM9gUF7Fpw4YQTE] must be checked before purchase the components. They all seem to be available and I don't see any problem. The total price would be 16$
Getting familiar with the universal axis ,freecad libraries,etc .
Meeting about the THC.
Assisting the meeting . Trying to let everything ready before start building the THC prototypes. Using circuit mill - Cyclone CNC Circuit Mill
Assisting the failed meeting and tunning the pcb mill.
Installing KiCad and taking a look to the 'Arduino THC' project files. After a week of research ,I have two different pcb circuits for a THC,I am thinking in replicate the 'Arduino THC', it is through hole soldering .
I found 'Arduino THC' . .
It's a fully documented project,seems using. Cheap and easy to find components (through hole ).
I will take a look to all the files and learn about it .
Today I was checking more DIY and arduino THC projects. I still having problems to understand the very sensor itself,its anatomy and so on.
Exploring more THC options .
Getting familiar with the actual circuit developed by Paulne 4 years ago [] .
Also found this old post PSoC Torch Height Sensing.
Diving the net to find more actual solutions, I have found this forum:  .
There, they discuss about a cheap THC system ,called "miniTHC"  .
Here's a link to the youtube channel of Adrian H  where he explains in detail the miniTHC.
I need time to analyze in more detail those videos and the miniTHC itself. I want to compare it with the CapSenseV1Brd [].