I have a project that I am working on that has instructions as follows: 1. Nothing can be protruding form the can and the can must have a lid. 2. The the height of the can cannot exceed 2*d. 3. After the lid is shut on the can it must "tip/ flip" after 30 seconds. I have a mouse trap attached to a can and it causes the can to tip, but I need help on configuring a "triggering" device. I have tried using a kitchen analog timer however this has not resulted in effective results (sometimes it works sometimes not). Any ideas on another device to trigger the mouse trap?