2 layer board of 2.75x3.39 inches (69.85x86.06 mm). The second iteration prototype mainboard for a 3-5 digit prosthesis whose actuation is enabled through motors controlled by muscle impulses recorded via surface electromyography (sEMG). The main goal is to create a low-cost prosthesis with either a self- or assisted-calibration feature. This would improve a the prosthesis' usability and the patient’s quality of life, as minute changes in electrode placement from day to day use produce significant changes in motor control performance.