Instruction Book

Inverting the Hall effect sensor

I tried several options some of them listed here: 

• http://denethor.wlu.ca/pc300/projects/sensors/hallbook.pdf
• Copilot suggestion

• Chat GPT suggestion

But most of them don't work or make the LED switched on no matter what. Whether the magnet is here or not only changes the intensity of the LED.

And I think I have burnt my transistor in the process...

Next try will be this : 

found on this website : https://how2electronics.com/hall-effect-sensor-a3144-magnetic-switch/

I have asked on forums, so I am waiting for answers there too