Remixed of Self-Resetting Mouse Trap by stubbornmoose.
widened frame for accepting standard 3" dimensional lumber ramp
added counter weight pockets for pennies
resized magnet pocket for 10 x 3mm magnet with screw hole
removed material from plank and added stiffening ribs
resized screw holes for smaller size screws (M3 or self tapping screws can be used)
Use 6-8 pennies .... verify & calibrate operation using a 20g weight (typical house mouse), a typical AA battery is about this weight. Small self taping type screws can be used .. a steel screw is used in the "brace stop" for adjusting the gap to the plank magnet, to increase or decrease the magnetic release action. An unfolded medium size paper clip wire can be used as the plank pivot wire, 2 screws hold it in place.
Attach mouse ramp (2 x 3 or 1 x 3 lumber) using small nails, best to partially hammer into the wood, so they can easily be removed. Screws can be used also .. but the nails work nice since ramp can rotate on the nails, allowing perfect adjustment when setting up on a bucket or container.
Thanks go to Mouse by YahooJAPAN for the CAD image with mouse
(I'm remixing a "calibration" mouse from this design, 15% infill with 4 pennies should do it)