An ESP8266 microcontroller and two 3144E hall effect modules were used to sense eight magnets glued onto the outer housing of a “One Fast Cat” cat wheel. [Scott] installed the ESP8266 and hall ...

Just take this adventurous ragdoll cat, Lady Eleanor, for instance. She, being a rather ambitious kitty, has taken on the grand task of getting an exceptionally hard-to-reach magnet off of the fridge.