EMG Muscle Sensor Module V3.0 With Cable And Electrodes will measure the filtered and rectified electrical activity of a muscle; outputting 0-Vs Volts depending the amount of activity in the selected muscle, where Vs signifies the voltage of the power source. Power supply voltage: min. -3.5V. By detecting the electromyogram (EMG), measuring muscle activity has traditionally been used in medical research, however with shrinking but more powerful microcontrollers and integrated circuits advent EMG power Road and sensors can be used for various control systems.   This Muscle Sensor v3 measures, filters, rectifies, and amplifies the electrical activity of a muscle and produces an analogue output signal that can easily be read by a microcontroller, enabling novel, muscle-controlled interfaces for your projects. Specifications & Features of EMG Muscle Sensor Module V3.0:-   Diameter of Electrode Pad: 52 mm Cable Length: 2 feet Weight: 30gm. Improved adjustable gain (more rugged) Onboard port for new cables Connects to the board straight out of the box Power Supply : Normally ±9V dual power supply, minimum voltage is ±3.5V Supported with Arduino, Breadboard mountable Wiring Instructions:- To use this sensor, the user must have three electrodes connected to the subject’s body. The reference electrode should be placed on an inactive section of the body, such as the bony portion of the elbow, shin or forearm. This electrode should be connected to the black or brown cable. The two other electrodes should be placed along the muscle selected to be measured. The second electrode should be placed along the mid-length of the muscle; this electrode should be connected to the red cable. The last electrode should be placed at the end of the muscle and connected to the blue cable. Finally, connect pin SIG to an analogue input pin of your microcontroller and the GND pin to the ground pin on your