In my freshman Cornerstone of Engineering class, we were tasked with making an educational game. My group decided upon a dodecahedral math game with a digit on each face. Players would be asked a math question using a built in text to speech device and then input the answer one digit at a time. The most interesting part of the project for me was handling the inputs. We were required to use a Arduino Nano for the project, so we didn't have enough digital inputs for the buttons. Instead I designed a system where 5 buttons were wired in parallel across different resistors. The varying input from each button was then read by an analog input. The game and the wiring diagram can be seen below.
Capstone is Northeastern's Senior design project, where a team of 5 students work togther to solve a problem posited by faculty. My group attempted to address the unsatisfactory ergonomics and safety concerns of existing power tools with a new design optimized for users age 7-12. The proposed design was a frame apparatus for a Dremel tool. The design was inspired by 3D printers and CNC machines. A Dremel tool was attached to a rail system on the frame so it could slide in three dimensions. The frame featured a removable base, so hands are distanced from the cutting bit while installing wood blocks. It also had a safety mechanism to cut power to the Dremel if the door is opened accidentally. My focus in the group was the z-axis assembly shown in the top right screenshot. I designed a method to lock the z-axis in place while cutting, which is shown in the bottom left image.