This one took a bit more time: polarity detector, still using a linear hall effect sensor

You can see the first two magnets have different facing poles, and my implant, a cylinder, has one pole closer to my fingertip, and the other closer to my knuckle.

So much fun!

(Also, very good camera focus)

Next little project: dimming progressively a LED using a linear hall effect sensor!

I'm having a blast (re)learning electronics!

My left ring finger have a magnet implant for 5 years, but there's rejection, so it must go...

It's really hard, but for the swansong I want to play as much as possible with it. So, here's a LED turning on when a reed switch detects the magnet!