Proximity sensors are common enough in automation projects that we hardly give them a second thought — pick something with specs that match the job and move on. But they can be fussy to get adjusted ...

If you have a few ESP32’s lying around and nothing to do with them, let me show you some fun projects you can finish in under an hour. From full-on air quality monitors to simple sensor projects, here ...

Nailing the basics.

[Andrew Lamchenko], who has built a number of small e-ink-based sensors this year, released another design called the eON Indoor Air Quality Sensor. As his previous sensor designs, the eON boasts a ...