We’re excited to have put out a preprint demonstrating and validating a new open source Python based hardware and software for fibre photometry. This is the brainchild of Thomas Akam, and follows close on the release of pyControl, a package for implementing rodent behavioural experiments that he was instrumental in establishing in the lab. All the relevant design files and documentation are already online for anyone to use. Both are good and much cheaper than equivalent commercial kit.