The most common cause of combat and mass shooting fatalities is massive hemorrhaging, which is treated via the use of tourniquets. Research has exposed a distinct lack of innovation in this field, with no electronically controlled or powered tourniquets, and as such, this group sought to create a smart tourniquet prototype to prove its feasibility. A prototype smart tourniquet was developed, utilizing a ladder belt and specialized housing. Plethysmography was used to gather data, processed by an onboard Arduino computer and openRB-150 chip. Outputs were used to drive a servo for automatic application and tightening. Considerations were made for size, speed and ease of application. The project resulted in a successful prototype, tested for strength, function in different environments, and ease of application. The final culminating test was a fully powered occlusion test, proving the feasibility of a smart tourniquet. Keywords: Mechanical Engineering, Medical Engineering, Plethysmography, TCCC, Robotics, Tourniquet, Ratchet, Micro-controls