Arduino in an open source electronic platform based on user-friendly software and hardware. In Savanda, the Arduino is used as an interface between the respiratory belt and the computer. The purpose is to create a suitable electronic circuit in the Arduino kit for measuring the stretch in the electrolycra. In the circuit in the figure below, The respiratory belt is connected on the Arduino between and ”analog input A0” which is the first pin on the Arduino. We denote this analog input pin ”analog input A0” as . A resistance of Ohms is connected between ground and . The electrolycra works as a variable resistor, depending on the stretch of the material, denoted . Since , measured by the Arduino, depends on according to the relation and depends on the stretch , therefore can be used as a quantity to measure the stretch .
Circuit diagram of parts connected to the Arduino.
Image of the Arduino kit and its connected parts.