In Engineering 121: Engineering Innovation the final assignment was a Rube Goldberg Machine consisting of 4 teams with 2 passes per team. Each pass required a sensor and action pairing. I volunteered to lead our group of 11 students and coordinated the design phase, held group meetings, supervised construction, then guided our final efforts. Our team’s theme was Mario. My individual contribution was an intake ramp leading from the Electromagnetic Pyramid to the green tube, where the ball triggered two limit switches. One limit switch triggered an LED splash animation using an Arduino and three Adafruit LED Rings, and the other triggered a 555 timer circuit. The 555 timer used the time delay of discharging a capacitor, along with the RC constant, to connect power through a transistor for approximately 13.2 seconds. This power triggered a solenoid valve running at 12V DC to discharge water from a holding tank out of the screen, which ran water through tubing into our team’s second pass bot. The second pass used a water sensor to learn that the ball was in a catapult’s loading zone, which then triggered a motor at 12V DC to lift the ball out of a water-filled acrylic tank and up to the next team’s grand finale.