Catapulting, self-driving robot
While not the most spectacular display or quality - this device was part of a group project in which myself and 3 other participated in for the 25th Anual Warman design and build competition for 1st, 2nd and 3rd year mechanical & mechatronics students. Getting it to work was time consuming as none of us had much experience with building something physical. The code in the arduino board works on timers - much to my dismay, we ran out of time to get the transducer working else I couldve started applying the fancy things I learnt in udaciticy.com 's free course: CS373 Programming a robotic car.