TL;DR
The SendspinZero is a DIY audio receiver that allows you to set up multi-room audio systems using open-source components. It’s built around a Waveshare ESP32-S3-Zero board, which is an affordable microcontroller, and it can be assembled with off-the-shelf parts that total around $10. The design includes a 3D printed enclosure, and while the core functionality is about audio playback, it also supports features like displaying album art on a screen and controlling sound-activated lights, which are expected to be added soon.