This paper presents a new miniturised potentiostat device called TinyStat, of size 20mm (W) x 10mm (H), with the ability to conduct cyclic voltammetry measurements in a ferrocene methanol solution. Electrical measurements of TinyStat were also measured against a benchtop potentiostat, resulting in a voltage accuracy within +/- 0.6 mV and current accuracy within +/- 2.5 nA. The presented potentiostat device forms the first stage of a potentiostat device with the end goal of being a wireless, low-cost neurochemical sensing device to continuously monitor neurological conditions.