The Rodeostat is an open source potentiostat for performing electrochemical measurements. It is designed to work with the Adafruit ItsyBitsy M4 Express Board. It is a very flexible instrument with multiple output voltage and current measurement ranges. Current measurement ranges: +/- 1, 10, 100, 1000uA Output voltage ranges: +/- 1, 2, 5, 10V The Rodeostat firmware implements many common voltammetric methods e.g., chronoamperometry, linear sweep, cyclic and constant voltage voltammetry. Software is available in the form of a web-based application which provides a graphical user interface. A description and user guide can be found here: https://blog.iorodeo.com/rodeostat-software/ Software is also available in the form of a Python library which enables the users to configure and run voltammetric tests from a host PC. A getting started guide and documentation for the python library can be found here: https://iorodeo.github.io/iorodeo-potentiostat-docs-build/ The potentistat is packaged into a 3D-printed enclosure with a pre-programmed ItsyBitsy M4 Express. Each unit includes a micro-USB cable, set of 3 alligator clip cables for connecting to electrodes and a 50K dummy cell. New features available in version 0.2: Adjustable ranges, +/- 1, 2, 5, 10V, for reference electrode measurements Digital switches for software control of electrode connections Rodeostat is Open Hardware certified Rodeostat Product Guide All documentation about the Rodeostat, including links to designs, open source firmware & software and tutorials are in the Product Guide. The Rodeostat test and measurement equipment is for research use only (see Terms and Conditions).