[THN] Guy Builds A Thor-Like Hammer that Only He Can Pick Up

If you have watched the most recent Avengers movie, then you would be aware of a scene where all the superheroes Iron Man, War Machine, Hawkeye, and Captain America take turns to lift Thors hammer but fail.
To make his hammer immovable, Pan made use of:

• A capacitive touch sensor (fingerprint sensor) attached to the handle
  
  
• AnArduino Pro Miniand a solid state relay, which serves as a switching device.
  
  
• A microwave oven transformerelectromagnetthat uses electricity to produce a very strong magnetic field.
  

The electromagnet creates a very strong magnetic field, strong enough that when the hammer is placed on a metal surface, it feels too heavy to lift.

With only a little bit of programming, Pan made thefingerprint sensor act as a switch so when he grabs the hammer's handle and places his thumb on the sensor, the electromagnets turns off, allowing only him to lift the hammer.