Low-cost Arduino controlled dual-polarity high voltage power supply

Ion Mobility Spectrometry (IMS) provides low ppbv detection limits for gas-phase or aqueous analytes. These instruments rely an electric field to produce ion motion. This electric field is typically 200-600 V/cm with a 15 cm cell, requiring an HV source of 6-10 kV. In this work, we present a low-cost alternative for supplying this high voltage. Inexpensive, commercially available 0-20 kV HV modules are mapped to an analog 0-5 V input signal, controlled using an Arduino microcontroller and digital analog converter. Dual polarities are selectable through a front-panel switch and ramps potentials between settings to avoid damage to attached devices. (c) 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).