SEN0240 Datasheet SEN0240 | P7-P9

/*------------end here---------------------*/

// if less than timeBudget, then you still have (timeBudget - timeStamp)

// do your work

delayMicroseconds(500);

// if more than timeBudget, the sample rate need to reduce to

// SAMPLE_FREQ_500HZ

}

Calibration

Calibration is recommended for every time when you use it, for the EMG signal is

different in different position even of the same person.

 1. Modify the variable Threshold in the sample code to 0, namely: static int Threshold = 0;

 2. Upload the sample code to Arduino control board and open the serial monitor of Arduino IDE

to check the printed value.

 3. Relax the arm muscle and check the printed value of serial port. Calm down and relax for a

while to check and record the maximum value printed by the serial monitor. If the value is too

large, such as more than 1000, you can try fine-tune position of the dry electrode.

 4. Modify the variable Threshold in the sample code to the recorded maximum value, and

reload the sample code to Arduino control board.

 5. Open the serial plotter of arduino IDE and the myoelectricity waveform could be seen.

In general, the waveform is a line of 0 when the muscle is relaxed, shown as below. It is

normal along with occasional peak waveform.

Obviously myoelectricity waveform could been seen in the process of making a fist, shown

as below.

BasicApplication

This application explains the way to distinguish whether the EMG signal is made by

fisting counts. It can be applied to push-up counts, dumbbell curl counts. It also can be

applied to human-computer interaction, such as play Flappy Bird with EMG signal made

by fist.

Please refer to the Chapter 4: 4.1 Preparation and 4.2 Connection Diagram for

hardware connection and sensor position.

This sample code needs EMGFilters library file, please download and install the

EMGFilters Library first.

https://codeload.github.com/yuyouliang/EMG_Filter/zip/master

How to install Libraries in Arduino IDE

https://www.arduino.cc/en/Guide/Libraries#.UxU8mdzF9H0%7C

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are met:

1. Redistributions of source code must retain the above copyright

notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyri

ght

notice, this list of conditions and the following disclaimer i

the documentation and/or other materials provided with the

distribution.

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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

CT,

INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDI

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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF S

UCH

DAMAGE.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15

SEN0240

Mfr. #:

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DFRobot

Description:

Multiple Function Sensor Development Tools Gravity: Analog EMG Sensor by OYMotion

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