SHIELD-EKG-EMG Arduino Electrocardiography EKG Electromiography EMG shield

Well, I finally got something close to a regular ECG signal, by using the smoothing example. I wasn't interested in building a 80hz filter, but understood that I was seeing a composite signal. I used 5 readings, 9600 baud and delay(1).As others noted, the software that Olimex recommends only reads com ports 1-4, but most Arduino boards will be much higher. I wasn't interested in the conversion software, so I worked with the examples I found.In the meantime, please know that you can order sample AD8232 chips for evaluation. This was supposed to be easier, but that's not how I found the experience.

I like it, it's a neat shield and the price point is better than it's equivalents. I used it with an XBee S2 Mesh network to make a wireless EKG for a microcontrollers class. The documentation is pretty confusing though, and the provided code is specially designed for closed source, windows only software. I'll share some of the things I learned for future users:All this shield does is amplify, filter, and digitize the signals picked up by the electrodes, and puts the raw data on an analog input (A0 - A5). That's it. It may seem more complicated but don't be intimidated, that really is all that's happening until it hit's the arduino itself.Don't even bother with the software they recommend to you, it is an abandoned project stuck in v0.4. People still use it, but long term it is probably easier and more useful to build your own. The code olimex provides was specially designed to work with the software, it's not really documented and was very confusing for me to sift through. Thankfully, we can pretty much ignore it if we also ignore the software.To read the data all that is required is to use the AnalogIn example in the ArduinoIDE Examples folder, and set the pin to the associated analog input pin. Storing the data efficiently requires using arrays to store data in bytes, which is partly what the code they provide does, but I recommend looking online for tutorials, at this code will probably be more difficult to modify than it would be to build your own.To visualize the data, I recommend using Processing (free and relatively simple), if you have access/knowledge/interest, you can also use LabView (powerful and cheap for students), MatLab (very powerful, very expensive, very difficult), or Octave (open source equivalent to MatLab, free but difficult).To use the data as a trigger for a...,Digital actuation: name the variable, use a loop to test for a desired threshold (eg if x> 800) and have that threshold trigger a digital pin to go high or low.Analog actuation: put the actuator on a PWM pin, map the associated variable to (x, 0, 1023, 0, 255) and use analogWrite(PWM pin, x) to affect the ouptut.This device takes some practice to use, but it's pretty neat, I've enjoyed it a lot!

Works like a charm. The amps are well-calibrated to keep the S/N ratio high, and comfortably between the voltage rails. (I'm not sure, and don't think, it is possible to measure signal amplitude on a calibrated mV scale.) You will still need digital filters for 50/60 Hz noise, and movement artifacts happen with every EKG system. With this board, I got a clean, interpretable EKG signal.It is designed to support 3.3V and 5V arduinos. I only tried 5V, but have no reason for concern re: 3.3V.

Speedy Delivery and quality product. Much needed in creating Bionic Arms.

LOVE THE TECH

Good product. Just what we needed.

Works great! Indeed, ignore the provided software in most cases. Simply read the analog pin you chose with the jumper setting. Super easy!

Works Great. Does everything it was supposed too.

Eccezionale. Prodotto eccezionale, di una semplicità unica. Il rivenditore serio. Anche sul sito sono presenti esempi per cominciare a prendere familiarità con la shield. Davvero eccezionale

Valuto questo prodotto come ottimo perchè mi ha permesso di costruire un Elettrocardigrafo collegabile al PC con una modica spesa, e mi ha permesso di fare esperienza in merito. Consiglio questo prodotto a coloro che amano la sperimentazione come me.