Single-Player Rock Paper Scissors: Stimulating Muscles With Computer Controlled TENS Unit to Mimic RPS Gestures

Project Overview:  The project starts with a press of a button, the button initiates a simple function on the Arduino Uno that randomly chooses one of three options, rock, paper, or scissors. Depending on which option is selected, specific pins will output high voltage. This voltage will trigger the double pole double throw relays to switch. The relays serve as gateways for AC voltage to flow from the TENS 3000 unit to the electrodes on the user’s arm. By sending a high voltage to the relay, the pole opens the path for AC voltage to flow to the electrodes that were previously closed. When AC voltage flows through your muscles it stimulates them, causing them to contract. Placing the electrode pairs strategically in areas where they may only stimulate specific muscles, for example, the fourth and third lumbrical muscles to mimic the scissors motion, allows for the mimicking of any desired gesture. If the user finds the gesture their hand makes unclear, they may check the serial monitor on Arduino IDE which outputs the supposed motion after each button press.