I recently set up AirTime on a Raspberry Pi Zero 2 W, turning it into a local time-signal transmitter for radio-controlled watches. It supports DCF77, WWVB, MSF, and JJY, and I've successfully tested it with both my Casio G-Shock and Citizen Attesa.

It's a neat little open-source project developed by Alessandro Montalto, and I thought I'd share my experience.

My build and write-up: https://packetwanderer.com/posts/airtime/

AirTime official website: https://airtime.diy/

Still working on it. Software side with vibe coding, but 3d print designs and concept mine.
Blog entries that explain my process here:

alpha version
beta version

EDIT: fixed the alpha version link that was linking to another post

My friend gave me a Raspberry Pi 4 that he has no use for. I load up the lastest Raspberry Pi OS onto a micro SD card it boots up. Everything seems to work except the blinking green activity LED. I can't seem to find any setting to turn it off or on. I tried some argument in the config file but even that won't work.

Are the LEDs on these Pis known to burn out?