DATA ACQUISITION SYSTEM FOR ELECTRODERMAL ACTIVITY RECORDING

Electrodermal Activity Recording (EDA) is a non-invasive technique used for study the body reactions to various stimuli and has many applications in biomedical field (dermatology, endocrinology, psychopathology, neurology, etc.). This paper presents a data acquisition system that performs skin conductance measurements. The design has been oriented to provide the following key features: small size, connectivity with a personal computer, electrical safety, possibility for adding new functionalities and low cost. These characteristics were obtained by using of a digital signal processor which performs most functions through software and allows reduction of hardwired analog electronics to a minimum.