There’s still plenty of useful hardware out there that uses an RS-232 interface, like the Behringer Ultradrive loudspeaker systems that [Lasse Lukkari] works with from time to time. Rather than ditch ...

Based on an ESP32 (using the Arduino stack) and SDCard for control, and a LiPo cell charged wirelessly, the build is rather tidy. A couple of hall effect switches are mounted at the start of each of ...

Building your own smart devices can be a lot of fun, but as your projects scale in complexity, so can the parts required. I've wanted to build my own voice assistant for quite a long time now, after ...