摘要：An improvement of both the hardware and software of a previous design developed by the authors for the study of commercial electrochemical cells is reported. The galvanostat now features the automatic selection of the current scale, with a maximum full scale of 250 mA. An external reference voltage is also used to increase the precision (ca. 0.1%) of the measured cell voltage. In the new design, the acquisition software is linked to Excel spreadsheet. In this way, the nominal cell parameters can be read from the spreadsheet via the serial port and can be set without reprogramming the Arduino interface. Furthermore, the data are gathered directly into the spreadsheet, and can even be plotted in real time. The cost of the whole system remains under $150, not including the controlling laptop
