EMG Sensor ADC to Volt Conversion
Posted: Wed Apr 17, 2019 10:44 am
I've been using the Grove EMG detector in conjuction with the Grove shield and seeduino but I cannot convert the ADC values into voltage (or, as I would prefer, mV). The values given to me by arduino IDE is about 300 for a 5V reference and a bit under 500 for 3.3V reference. I have tried the extremely straightforward conversion, but without information about the amplifiers in the EMG sensor, I don't know how I can get accurate results. Using the conversion sensorValue * (5/1023) I get an output of about 1.4V when the actual voltage measured by the sensor/given off by the muscle should not be more than 100mV at the absolute maximum (typical would likely be 0-30mV or so). Does anyone know where I can find information about the amplification or what the proper calculation should be for the ADC values to mV?