how can i calibrate the sensor to get skin resistance and skin conductance value? sorry im still new to arduino and sensors
Get two resistors with known resistance and attach them instead of the skin sensor to the breakout board. Note the two values, the interpolation should be linear.
i got this equation from a website:
Human Resistance = ((1024+2*Serial_Port_Reading)*10000)/(512-Serial_Port_Reading), unit is ohm, Serial_Port_Reading is the value display on Serial Port(between 0~1023)
Excuse me but this is bullshit. The GSR Grove sensor includes three op amps to boost the voltage to a level the Arduino is able to measure. The board also has a potentiometer to adjust the value. So the equation almost most include calibration values measured on the actual board settings.