EMG Sensor ADC to Volt Conversion

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emrmcc
Pre-kindergarten
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Joined: Sat Mar 30, 2019 1:24 pm

EMG Sensor ADC to Volt Conversion

Post by emrmcc » 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?

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bestlux
Kindergarten
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Re: EMG Sensor ADC to Volt Conversion

Post by bestlux » Wed Apr 17, 2019 10:54 am

Hello,
This product is for qualitative measurement instead of quantitative measurement if you need an accurate value, you may need to calibrate it by yourself.

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