The fuzzy schmitt trigger algorithm regulates physiological action signals for disabilities auxiliary input devices

This study uses a single channel to measure bio-signals of a specific action from the primary motor cortex, and converts it to a disabilities auxiliary input device. In signal processing, we calculate the contour of the bio-signal and develop the fuzzy Schmitt trigger (FST) algorithm regulated the action signal´s detected level automatically. Finally, we convert the action signal to a Transistor-Transistor Logic (TTL) signal as a Morse-code signal, then a persons with severe disabilities can utilize it to communicate with others.