Design of a Portable Potentiostat with Dual-microprocessors for Electrochemical Biosensors

Abstract

In this paper, we design and implement a portable potentiostat by using dual-microprocessors for the signal processing of electrochemical biosensors. In our design approach, one of the microprocessors is used to design the programmable waveform generator, and the other microprocessor is used to measure the current of biosensors. The proposed potentiostat can perform general electrochemical analysis functions, including cyclic voltammetry, linear sweep voltammetry, differential pulse voltammetry, amperometry, and potentiometry. In the experiment, we adopt a commercial screen printed electrode immersed in potassium ferricyanide solution to test the performance of the proposed potentiostat and compare the proposed potentiostat’s measured results with a commercial potentiostat’s (CH Instrument Model: CHI1221) under the same test condition. The experimental results show that the proposed potentiostat has the merits of good accuracy, low cost, low power consumption, and high portability.