This project was completed through Volunteers for Medical Engineering, described in my About section. We were asked to design and build an attachable test instrumentation device to measure the efficacy of adding weights to ankle foot orthoses (essentially ankle braces) in reducing lower leg instabilities in patients with conditions such as cerebral palsy. To accomplish this, we would measure and analyze lower leg acceleration in three dimensions and determine the relationship between weight and acceleration. I developed housing designs in SolidWorks to hold an Arduino Nano with an integrated accelerometer, along with peripheral components including an SD card reader, a real-time clock module, and a power switch. I also 3D printed the designs for our evolving prototype to adapt to changing specifications and to continue to optimize housing size and form to minimize intrusiveness and patient discomfort.