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  • DIY Muscle Sensor / EMG Circuit for a Microcontroller

    Hi, when the cutoff frequency for high pass and low pass filter was calculated i got values of 106.1 and 1.97 respectively , i didnt understand as to why put a high pass filter first of cutoff frequency 106.1 which allows frequency above 106Hz and then employ a low pass filter with cut of frequency 1.97 HZ which allows frequency only below that!!what is the whole point if u filter out it with high pass filter initially?and also isn't the range for EMG signal 20-150Hz, please explain

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