Full Potentiostat System with wireless communication in a Programmable-System-On-a-Chip and a PC

Abstract

This thesis is about the development of a Potentiostat System. The objective is to have a device capable of being embedded in rotary disk platforms and watches. Hence, some of the features are the small size and the low power consumption. The dissertation addresses those concerns thought a Programmable-System-on-a-Chip demonstrating that this solution is a good approach. Thus, this document explains from the circuit design until the validation of the entire system. A series of steps establish the path to reach the objectives. The circuit review describes relevant configurations to control the voltage and read the Redox current. The prototype design explains the circuits implementation in hardware and the development of electrochemical trials in software. A characterization allows us to make the proper compensations to have accurate results. The completion of several electrochemical experiments validates the embedded system capacity, and it establishes the working range of the applications. Therefore, it is easy to accomplish the objectives with all this in mind. As results, the Potentiostat System is capable of handling negative and positive Redox currents in the range of 86.44 to 3000 nA and the voltage control is of ± 2 volts. The samples per second of this device goes from 50 to 2000. All these features make the prototype suitable for health, environmental, and research applications. Biosensors to detect glucose, melatonin, hydrogen peroxide, nitrite, and the xanthine oxidase enzyme are examples of specific applications for this electronic system. Therefore, the Programmable-System-on-a-Chip strategy is suitable to develop portable and low energy devices.