# Output HAT for Raspberry Pi, 5 Darlington-transistors > Raspberry Pi driver shield for stack lights. Project documentation available at: https://blog.cavelab.dev/2019/12/rpi-stack-lights-controller/ ![Output HAT for Raspberry Pi, 5 Darlington-transistors](https://i.logistics.cavelab.net/large/2610.jpeg) ## Author **Thomas Jensen** * Twitter: [@thomasjsn](https://twitter.com/thomasjsn) * Github: [@thomasjsn](https://github.com/thomasjsn) * Website: [cavelab.dev](https://cavelab.dev) ## License The MIT License (MIT). Please see [license file](LICENSE.txt) for more information. --- _This README was automatically generated using µLogistics_ (`projectid:215`)