Microcontroller-based Electrochemical Impedance Spectroscopy for wearable health monitoring systems

This paper presents a prototype design of a small form factor microcontroller-based Electrochemical Impedance Spectroscopy (EIS) platform for integration with health monitoring systems. Existing EIS systems are expensive and relatively large in size to be integrated with wearable medical devices. The focus of this paper is to present prototype based on a hardware software co-design to be conceived as a stand-alone module for easy integration with medical devices. Currently, the system is able to analyze samples within the frequency range of 0.02 Hz to 200 kHz or measurements of impedance phase and magnitude. The platform is tested with cell impedance models and is able to calculate the magnitude and phase of the complex impedance with a percentage error of less than 5%.