I've built a little dual probe temp monitor for my swimming pool using ESP32. I've been researching how to power it from a battery like an 18650 and from what I gather I need a buck-converter to ...

This incredibly creepy, but admittedly awe-inspiring, project comes to us via u/my_3d_scan in the ESP32 subreddit. They showed off a video of them "driving" their ESP32-powered facehugger around, thus ...