<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This paper describes the proof of concept for a wearable device that measures skin conductance, to provide a way of quantifying an individual’s physiological stress response to external stimuli. Important goals of the project were to have reliable measurements that correlate with the external stimuli, as well as a small footprint and low power consumption to facilitate battery powered operation.</p>
<p>These goals were accomplished using a STM32L476 micro-controller to generate an AC sine voltage across two solid gel electrodes placed in the palm of the hand, converting the resulting current to a voltage with a trans-impedance amplifier, which was then sampled and processed digitally in a lock-in amplifier, to eliminate signals differing from the desired (reference) frequency and phase. The output of the lock-in amplifier represents the skin conductance and was transmitted over USB to a computer with software for serial capture.</p></abstract>

This paper describes the proof of concept for a wearable device that measures skin conductance, to provide a way of quantifying an individual’s physiological stress response to external stimuli. Important goals of the project were to have reliable measurements that correlate with the external stimuli, as well as a small footprint and low power consumption to facilitate battery powered operation.
These goals were accomplished using a STM32L476 micro-controller to generate an AC sine voltage across two solid gel electrodes placed in the palm of the hand, converting the resulting current to a voltage with a trans-impedance amplifier, which was then sampled and processed digitally in a lock-in amplifier, to eliminate signals differing from the desired (reference) frequency and phase. The output of the lock-in amplifier represents the skin conductance and was transmitted over USB to a computer with software for serial capture.

Development of a small footprint device for measuring electrodermal activity in the palm of the hand

Journal of Electrical Bioimpedance

This work is licensed under the Creative Commons Attribution 4.0 International License.

This paper describes the proof of concept for a wearable device that measures skin conductance, to provide a way of quantifying an individual’s physiological...

Development of a small footprint device for measuring electrodermal activity in the palm of the hand

Published Online: Jan 14, 2023

Page range: 150 - 155

Received: Oct 10, 2022

DOI: https://doi.org/10.2478/joeb-2022-0021

Keywords
Bioimpedance, electrodermal activity, electrode placement, signal processing

© 2022 Åsmund Aukrust, Leah Marie Foseid and Kristiane Holm, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Development of a small footprint device for measuring electrodermal activity in the palm of the hand

Published Online: Jan 14, 2023

Page range: 150 - 155

Received: Oct 10, 2022

DOI: https://doi.org/10.2478/joeb-2022-0021

KeywordsBioimpedance, electrodermal activity, electrode placement, signal processing

© 2022 Åsmund Aukrust, Leah Marie Foseid and Kristiane Holm, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Bioimpedance, electrodermal activity, electrode placement, signal processing