On Air light signal
thingiverse
This is a light signal, using sonoff mini to turn on/off. Is a simple box with snap fit (thanks to https://www.youtube.com/watch?v=HcLT5Hz9-mk&ab_channel=adamjames) I've uploaded a fusion file, feel free to modify as your needs
Download Model from thingiverse
With this file you will be able to print On Air light signal with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on On Air light signal.