January 2008 Archives

I've finally finished putting together the parts to connect multiple NTP reference clocks to the same serial port...

It uses three reference clocks - one GPS receiver and two radio clocks (DCF77 and MSF).

I have a second doorbell because the one in the living room is too far away to hear from the computer - especially with music playing - but it uses up AA batteries far too quickly and I don't easily notice that it's no longer ringing with the main one. So I connected it up to a USB port instead...