I am working on an assembly driver for the GE color effects rgb lights. This is my first attempt at writing any assembly code,
In Western Europe, there are the so-called DCF77 - long-wave transmitter.
This post on 77KHz the exact time and date information.
Four multiplexed lasers and a Hamamatsu S6986 sensor control two servos in a pan & tilt arrangement to actively track a moving Scotchlite reflector.
They're closing them out. [This is in the US.]
BTW it's only under $8 in store.
Online sales are $12