Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.



1340 posts

Uber Geek
+1 received by user: 285

Subscriber

Topic # 107118 7-Aug-2012 18:44 Send private message

The freeview digital signal contains some kind of time signal.

Has anyone heard of an electronic kitset that could be used to extract this time signal to use it to keep a device supplied with the current time? Cheers.

Create new topic
880 posts

Ultimate Geek
+1 received by user: 21

Trusted

  Reply # 669222 7-Aug-2012 19:19 Send private message

I guess you're talking about the MPEG 2 TDT?
This is a standard MPEG 2 transport stream table. You'd need a tuner to tune the signal and then some kind of software or firmware to parse the transport stream and pull out the detail that you need. Seems like quite an involved way to get the time. What kind of device are we talking about?

79 posts

Master Geek
+1 received by user: 1


  Reply # 669235 7-Aug-2012 19:38 Send private message

Surely a GPS receiver would be easier and tell you to nano-second accuracy. Some GPS receivers have a serial connection and I remember coding some API to use it once (in ye olde days circa 2000). (Geez, some probably are USB or wifi these days). It's in the 300 baud rate ephemeris data. You can get the time out of it I think only locked onto a single sat.

Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





Trending now »

Hot discussions in our forums right now:

House Auctions
Created by t0ny, last reply by Elpie on 24-Oct-2014 22:28 (31 replies)
Pages... 2 3


Speed limit when overtaking? Teach me please.
Created by nakedmolerat, last reply by Shadowfoot on 24-Oct-2014 20:33 (63 replies)
Pages... 3 4 5


Neon - Sky's new streaming service
Created by JarrodM, last reply by adida101 on 24-Oct-2014 22:00 (18 replies)
Pages... 2


Spark Socialiser
Created by freitasm, last reply by freitasm on 22-Oct-2014 18:39 (34 replies)
Pages... 2 3


30 too old to get into IT?
Created by Interslice, last reply by shk292 on 24-Oct-2014 20:39 (16 replies)
Pages... 2


American legal jurisdiction in New Zealand
Created by ajobbins, last reply by gzt on 21-Oct-2014 14:58 (30 replies)
Pages... 2


iPad Air 2 and iPad Mini 3. Gonna get one?
Created by Dingbatt, last reply by Paul1977 on 24-Oct-2014 11:16 (107 replies)
Pages... 6 7 8


5Ghz AP recommendations?
Created by ubergeeknz, last reply by sbiddle on 24-Oct-2014 12:42 (12 replies)


Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.