For this semester-based project, a group of 2 other students and I were tasked to build and design a fully functional machine for a company, essentially like a mock-engineer project. Our job was to create a machine that could intake AA and/or AAA batteries (either charged or dead), test their voltage, and sort each battery by size and charge status. By the end of the semester, we were able to build a machine that could sort and test both AA and AAA batteries. Although our final build was fundamentally different from our design, the machine could autonomously perform its task efficiently and effectively. For our build, we used IR sensors to detect the presence of a battery that triggers a pneumatic actuator covered in copper tape, slowly pushing the battery into a panel (also covered with copper tape) and a wire. Once the voltage is read, a spinning sorting system will either stay moving toward the "dead" side or (in the presence of a "good"/charged battery) flip to sort in the opposing direction. All systems and pathways were completed using ladder logic and an HMI system with a custom-made interface.