Save the Polar Bear simulates a classic arcade game box with three distinct games played simultaneously. The main frame assembly is composed of 6 Duron 1/4 inch panels, an LCD box on top, and a user-interface panel on the bottom front. The inner 3 panels holds together the subassemblies of each game, and the outer 3 panels protect all components. Below can be seen the general dimensions and layout of the game box
Front View
Side View
Top View (Without LCD box). All dimensions in the above figures are in inches.

Sub-Assemblies

Rainwater Collection


​The rainwater collection subassembly consists of a slider-crank mechanism actuated by a servo to move a bucket linearly across a distance of about 14cm.
The links were laser cut from birch wood of thickness 1/8th inch. The main base that mounts the servo was cut using 1/8th inch duron. The slider link was simply a long bolt that and slid in the 3mm wide groove cut in the base.

This subassembly fits into the main assembly via the eight corner bolts.

Recycle Basket

A simple beam break circuit consisting of a IR LED/photo-transistor pair was used to detect when objects passed through the recycle bin. The recycle bin was 3D printed with channels and holes on the sides to accommodate the sensor, the LED, and the wires. The bin was approximately 100x130x100 mm in size.

Whack A Light

IR Tape sensors and its corresponding LEDs are held together by a circular platform, offset from the main display panels by spacers to create the illusion of "holes" for a hammer with white, reflective surface to cover.

LEAF Detection and Stamp

A panel is assembled at the platform to limit the position of LEAF and a tape sensor is fixed on it to detect the black block on LEAF to make sure it is inserted in the right direction. A servo will rotate the marker to put a stamp on the LEAF.

Passage of Time

​The passage of time subassembly consists of a slider-crank mechanism actuated by a servo to raise and lower the polar bear shown in the picture.

Congratulations!

Congratulations to the winner of our game! A servo will flip up a poster to thank you for your effort in saving polar bears.