Recent content by Mo_Tuk

Thanks, Windadct I don't know what the code installed in ardiuno because when I installed arduino package, the MATLAB automatically install some code to arduino board. I will change the communication using serial command instead of using arduino package and I will attache the results. cheers...

The designed system has (20 to 500 Hz) band-pass filter which means that the emg signal frequencies should be in this range,and as Nyquist Theorem the minimum sampling frequency in this case should be at least 1k Hz, and I searched about ADC of the arduino and found that it has deafult fs=9600...

Thanks, Tom About the 2.5 offset, I made it in hardware "DC level shifter" because I want to shift the signal up so all signal will be in positive side, to let the ADC of the arduino digitized correctly. I hope you understand me.. Can I change the sampling frequency of the ADC to higher one...

Thanks Scottdave This screenshot shows the output of the system which connected directly to oscilloscope, knowing that the sample rate of this scope is up to 2 GS/s Real Time

Hello I'm working on project for "design & implementation of EMG data acquisition" for now I completed the design and connected the output of the system to arduino uno to read the emg signal in real time with MATLAB 2017b using arduino support package. the problem is that the signal looks as...

Hello I added the dc lavel shifter and the circuit works fine with arduino using ADC of the arduino, but now I have to do two things: 1) comparing the result with other built-in EMG shield by using correlation technique "Auto-Correlation" 2) add some realistic application to prove that the...

The attached image is the schematic for EMG circuit that worked, and I have question about DC level shifter circuit should I add it ?? so that (e.g. the output will be from 0 to 5V max), because Analog to Digital Converter "ADC" of the arduino can only accept this range. any Suggestion ...

Thanks @Tom.G I will post the schematic, now I need to know how to get data from the oscilloscope so that I can deal with it using Arduino, the oscilloscope used is "Tektronix TDS 2024B" and I just used Print button to capture the signal.

This is screenshot of the activity of my bicep muscle (Resting and Contraction)

Screenshot of the circuit that I connected on Breadboard, I hope it's clear.

I have also another type of electrodes (Covidien Kendall Q-Trace Diagnostic Tab Electrodes Resting ECG Electrodes) , is that type better than (BioProtech)?

Thanks @jim hardy for the connection you made of electrodes A&B to reference, would that help to reduce noise or something else??

Thanks @Tom.G do yo mean photograph of the circuit connected on the breadboard?? and about the electrical noise I think the laptop was near to my circuit and plugged into charger.

Thanks @berkeman I hope this screenshot of the circuit would be clear, and about the DSP part for now I just want to see clear EMG signal from my bicep muscle and then I will move to programming part using Arduino. and about the electrode cables would you suggest any specific type of cable...

Yes, I'm using two +/-9V batteries to supply the circuit, and I used surface electrodes "BioProtech Electrodes" which shown in attached image. Although the signal is 50Hz noise but when I flexed my bicep the amplitude increased but the signal still almost the same "50Hz noise"