Fig. 2.

Full assembly of PAW. A. The Dome and Base components of the PAW system, 3D-printed with PLA. Four M3x12 screws were inserted into the base (B) which are then used to hold the electronics in place using the holes on the Arduino Microcontroller board (C). D. The Base is then secured to the Dome with three M3x8 screws. E. The Bio-Serv Mouse Igloo fits securely over the Dome. F. A strong magnet is glued to the inside of the Bio-Serv Fast-Trac wheel, (G) which is then mounted onto the Mouse Igloo. Fully assembled PAW systems in commonly used mouse laboratory home cages from (H) Ancare (N10 Mouse) and (I) Techniplast (GM500).