EMG Prosthetic Arm with Motorized Whisk Mechanism

A prosthetic arm prototype with a whisk attached?

Everyone's got to bake, and this prosthetic arm makes it extra easy. It starts with a flex of your forearm. The signal travels through the EMG electrodes into custom designed circuity, consisting of low and high pass filters, an active rectifier, a peak detector and more. This turns the messy signal into something real smooth and readable. This signal is read by the Arduino, which then instructs the motor to spin.

The mechanism works using a planetary gear system, which allows the two whisks to rotate around their own axes, as well as around a central axis (like how the Earth rotates and orbits the Sun).

This design allows for the whisks to cover the entire area of a bowl in the most efficient way possible. All the parts were carefully modelled in SolidWorks and 3D printed or laser cut.

Arduino, C, Solidworks, 3D printing, Oscilloscope/DMM