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

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 stimul...

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Bibliographic Details
Published inJournal of electrical bioimpedance Vol. 13; no. 1; pp. 150 - 155
Main Authors Aukrust, Åsmund, Foseid, Leah Marie, Holm, Kristiane
Format Journal Article
LanguageEnglish
Published Poland Sciendo 01.01.2022
Journal of Electrical Bioimpedance
Subjects
Bioimpedance
electrode placement
electrodermal activity
signal processing
electrodermal activity
signal processing
electrode placement
Bioimpedance
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Summary: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.
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ISSN:1891-5469
1891-5469
DOI:10.2478/joeb-2022-0021