January 2008 Archives

NTP reference clocks

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

[Inside of box]

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

[MSF receiver]

[DCF77 receiver]

[GPS receiver]

USB powered doorbell

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...

[USB powered doorbell]

About this Archive

This page is an archive of entries from January 2008 listed from newest to oldest.

February 2007 is the previous archive.

March 2008 is the next archive.

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Content authored by myself is just my honest opinion. If you find any words or pictures menacing or offensive, stop reading now.

Jabber

simon@arlott.org.uk
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