This is a project to create an EMF tester with an Attiny85 and 4 leds. See the description on www.0lab.it or instructables (https://www.instructables.com/id/Attiny85-EMF-detector/).
serg7461/Attiny85_EMF
This code is part of Attiny85 EMF detector. You can see the tutorial on Instructable (https://www.instructables.com/id/Attiny85-EMF-detector/). After the project has become "EMF PostCard Project" on projectg.it.