Development of a recording system for electrochemical signal from voltammetry

This study aimed to reduce the production cost of a potentiostat and minimize its size compared to conventional devices. A STM32 Nucleo32 was used as the main controller unit to achieve the purpose of the study. Additionally, a smartphone application was created to record data, display an experimental signal and control the parameters of the experiment. It was found that the production cost of the developed potentiostat and the smartphone application was quite cheap while its size remained compact. In terms of its usage, this device can apply voltage to electrochemical systems in the range of -2 to 2 VDC with 1 mV resolution. The measurement of the maximum current can proceed to -0.25 mA on its negative side and 0.25 mA on its positive side. The lowest current detected was 2 microA. The developed potentiostat presented satisfactory results for sensitivity, stability and accuracy and can be used with a smartphone for real-time measurement.