Building a OnAir sign
I wanted to design a portable sign, which tells my fellows, when there is an open microphone or camera and an ongoing online meeting.
Portabilty is done with a 18650 lithium battery, which is loaded via USB. I use a TC4056A Lithium Battery Charger. The Wemos D1 mini runs WLED. The 10x WS2812 LEDs are behind a diffusor, which light up the sign from the back. Instead of loading it via the USB I could also add a 6V solar panel.
The software is configured to use MQTT and the OpenHAB2 runs a scene, which I can trigger via Apple Homekit just by saying “OnAir”.
Download the STL files
I added a zipfile with all the STL files. Copyright is by me. Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License