Over the past decade, the open-source hardware movement has allowed nonexperts to create complex electronics and computing projects. Generally, an open-source hardware project combines ready-made microcontroller boards, sensors, actuators, and software with collaborative online support.
These resources allow designers to combine hardware and software for a variety of purposes, including the creation of educational tools (1–3). This paper describes an open-source tool intended to help Anatomy and Physiology students test their knowledge of muscle actions and joint movements. These topics can be difficult, as they require students to visualize motion in three dimensions.