- This project concerns the design, layout, assembly, debugging, and testing of a Printed Circuit Board (PCB) that autonomously, reliably, and effectively conducts Cyclic Voltammetry (CV) measurements. CV is an electrochemical procedure done to analyze, quantize, and visualize reversible reduction-oxidation reactions, often used in medical devices to monitor the levels of certain hormones or other chemicals present in a person’s body. As such, this PCB is meant to be portable and easy to use: the system is small, lightweight, and low-power, with a way to easily conduct these reactions, record the data, and send it to a phone or other external computer for processing and visualization. These actions all take place automatically, with no request from the user. This project was based on an existing PCB and uses the same microcontroller, Analog Front End chip, and Analog-to-Digital converter, but optimizes the voltage regulation, adds a battery charger and monitoring loop, and minimizes the Bluetooth antenna circuit. After the basic CV curve is obtained and analyzed through this new system, the parameters that affect a clean and presentable CV curve are noted and discussed. The board was tested using Ag/Ag+ electrodes as the anode and 0.1M Ferrocenemethanol solution as the cathodic solution, and the results are compared to existing literature and to CV curves made by more precise desktop instruments.
- Key Words: Cyclic Voltammetry, PCB, Redox, Design, Testing