Perovskite solar cells (PSCs) have shown great potential for the future of solar powered energy production. They are however not completely flawless, and one of their more disadvantageous properties are their relatively slow response time. The Department of Materials Science and Engineering at Uppsala University have an interest in the ability to quickly measure the response time of PSCs for further development of optoelectronics. The purpose of this project was to provide an instrument with the ability to easily perform these measurements. The instrument was to be controlled by code from a computer which via usb connected to a microcontroller connected to the rest of the circuit. The electrical circuit was first constructed on breadboards for testing and optimisations, to later construct a circuit board which would neatly fit the entire circuit in a small space. The microcontroller was an Arduino NANO which sampled the current through the PSC at a rate of 33 kHz, which was slower than initially intended. It was however decided that the sample rate was sufficient for the application.