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Φlati

A physiological sensor to measure, record and display real-time electrocardiography (ECG), galvanic skin response (GSR) and respiration

Frédérik BerthiaumeFrédérik Berthiaume
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  • Description
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  • Frédérik BerthiaumeFrédérik Berthiaume

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medical Physiological ecg gsr Respiration electrocardiography galvanic skin response lie detector electrodermal Biology instrumentation biomedical psychology wireless sensor nrf24l01 atmega328p scilab Psychophysiology Human-Computer Interaction human-COMPuter interface computer biofeedback physiology research

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This project was created on 02/12/2016 and last updated a year ago.

Description

This is a wireless, battery-powered physiological sensor that sends electrocardiography (ECG), galvanic skin response (GSR) (AKA electrodermal activity) and respiration (plethysmography) signals to a remote computer in real-time. The circuit uses instrumentation amplifiers, some basic analog filtering, digital acquisition with an Ardweeny (Atmega328P), wireless transmission with a NRF24L01+ chip. A GUI runs on Scilab to display the data and to compute heart & respiration rate.

Yes I know about the BITalino thing but I found it a bit expensive and it's more fun to design all the sensors from scratch. Plus it doesn't have a respiration sensor and I find that it's a valuable addition to a physiological analysis. Open source documentation for the hardware on such projects is almost inexistant so here is my contribution!

Details

Files

Bioinstrureceiver.ino

x-arduino - 385.00 bytes - 01/04/2017 at 21:47

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Bioinstrutransmitter.ino

x-arduino - 701.00 bytes - 01/04/2017 at 21:47

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philati_bom.html

HyperText Markup Language (HTML) - 12.16 kB - 01/04/2017 at 21:43

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philati_schem.png

Portable Network Graphics (PNG) - 371.91 kB - 01/04/2017 at 21:43

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philati_bb.png

Portable Network Graphics (PNG) - 463.37 kB - 01/04/2017 at 21:43

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michael wrote 03/11/2017 at 15:42 • point

Hi! 

can you provide some more information on the respiration sensor? please :)

  Are you sure? yes | no

Frédérik Berthiaume wrote 06/08/2017 at 00:44 • point

Hi sorry I've just seen your comment. What do you want to know? Basically it's a belt made with a section of conductive rubber cord, like this one : https://www.adafruit.com/product/519

  Are you sure? yes | no

michael wrote 06/08/2017 at 06:11 • point

Thank you for the link! I was not sure what kind of sensor you are using and if you are measuring the expansion of the chest, but now this is clear. Still searching for a sensor that is unnoticeable... ;)

  Are you sure? yes | no

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