House for sale!

November 5, 2009 at 20:31 | In Uncategorized | Leave a Comment
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Terraced House, 2 Bedrooms, 1 Bathroom, 2 Receptions, South Facing Garden £157,500

Our house

Is anyone looking for a 2 bed house in Southampton?!

See Tepilo for more information, photos, floor plans and to book a viewing.

Yay!

October 15, 2009 at 10:53 | In Uncategorized | 1 Comment
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As it says on the box…

iod-moo

…the cards for the Information On Demand 2009 conference arrived today! Hopefully they should help people pick out the best sessions for their agenda, and get more people to join other MDM Workbench developers at our developerWorks space.

My first CurrentCost development board circuit

June 22, 2009 at 17:59 | In Ones and Zeros, Uncategorized | 6 Comments
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The result of a fair bit of googling and a weekend of hacking is… [drum roll]… a circuit to connect my gas meter to a CurrentCost Envi using a nice little dev board from CurrentCost

cc-circuit

Now I’m much more familiar with messing about with software, not all this messy hardware stuff, so I’m really hoping to get some feedback to improve this early prototype!

So, my theory is that the stuff on the left will trigger the timer on the positive edge of the pulse from the gas meter. R1 and C1 control the 555 timing; more on that in a second. And the stuff on the right (LED and the CurrentCost dev board) should be triggered whenever the gas meter is running and emitting pulses. It all seems to work, except that I can’t seem to get the timing quite right. The gas meter takes about 1m40s between pulses, and I can choose values for R1 and C1 that trigger the output for the right length of time when a single pulse is detected, unfortunately subsequent pulses don’t keep the output on as I was hoping. The best I’ve managed is with R1 = 3M ohms and C1 = 100uF, which does stay on as long as there are pulses from the meter… unfortunately just for a little too long at 5 minutes. Still, at least the CurrentCost Envi will get a reading all the time the boiler is running, and it won’t get stuck on if the meter stops on the portion of the dial where the reed switch is closed.

Any comments with glaring errors, small problems, improvements, or a completely different way to do it?!

Updated: looks like I was having problems with left and right in my first description! Hopefully I’ve got them the right way round now! (2 July 2009)

Update: for an alternative approach (latching a pulse and clearing it when the cc board transmits) take a look at the circuit and photos on John’s blog. (9 July 2009)

The IET gets sociable

April 28, 2009 at 22:05 | In Uncategorized | Leave a Comment
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I recently read Yes, we can twitter while catching up on some E&T reading. Probably the most interesting bit for me was seeing @TheIET is also on twitter, so I tore off the bottom of the page with the link on to check out. Web 0.1 bookmarking then; I still like reading on paper.

The IET twitter account doesn’t look like it’s progressed beyond getting their brand on there; they don’t follow anyone, have a surprisingly small 168 followers and don’t seem to be talking to anyone. Still, hopefully it’s just a small beginning and, amongst the links to their web site, I did spot a press release about the launch of the new IET social networking site! That news somehow passed me by until now, so I’ve been investigating to see what it offers. To start with, I have yet another profile, which is not a big surprise. Earlier today I was scratching my head over a spiced up developerWorks profile. It has a bookmarking service which, for anyone in the IET new to such things is great. While I already use delicious for my own bookmarks, IET Discover combines bookmarks with groups, in what looks quite a similar way to Lotus Connections. There’s already a good selection of groups, although I’ve not found any that appear that active yet. Groups have always been a bit of a mystery to me in things like Facebook, never quite fulfilling their apparent potential, mostly ending up little more than a way to tag yourself as being interested in something.

Talking of tagging, from what I can tell on first look, I can tag my own profile, but other people can’t tag me, which seems like a missed opportunity. I think there’s much more value in tagging other people. In networks where you can tag yourself, I tend to have a poor attempt to start with, and then never return to keep the tags up-to-date.

And finally, I can watch people… except so far I’ve not found anyone to watch. I’m guessing it’s much like adding people to your delicious network.

Overall, it’s an interesting foray into the world of social networking. Like LinkedIn, it has a more professional focus, but it feels more limited by association with a single professional body. With recent homecamp, arduino and related projects in mind, I joined the electronic circuits group, but there are already more established social networks around those topics, whether IET members or not. Having said that, I think there is a place for more focused social networks. For example, I’m a big fan of developerWorks, where I’ve been trying to get some momentum for a community around the MDM Workbench, which is after all a pretty niche topic. So IET Discover looks interesting, and it has the potential to get me more involved in the IET. Time will tell how it turns out… maybe @TheIET will share their view…

Home Easy -duino

February 1, 2009 at 12:50 | In Ones and Zeros, Uncategorized | 6 Comments
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So I’ve done a bit of playing with the Freeduino and I can see why people like Arduinos so much: they really are simple to get working. It might only start with a blinking LED but it’s nice to feel you’ve achieved something so quickly. I wish more software was like that!

The reason for getting an arduino was to experiment with some more home automation, so I’ve ordered 433MHz AM transmitter and receiver modules which look (to the untrained eye) like they should work with my Home Easy sockets. Hopefully they’ll also be simple to wire up to the arduino as well! I’ve found a couple of projects which look like they might help get me started with the code:

In fact, combining infrared with Home Easy, to turn off a couple of sockets when putting the TV on standbye for example, might be interesting. The first thing I want to try (assuming I get it working at all!) is forwarding commands via the arduino. So, for example, the arduino could relay an on command to the living room lamp, but only if the CurrentCost reading is low enough (i.e. the kitchen lights aren’t still on)!

I’ve been using the simple oscilloscope hack to do some prototyping while I wait for the AM modules to arrive, and I’ve managed to ’send’ a sample signal that looks about right. I’m not so sure about how good the timing is going to be though, and I’m still pondering about receiving Home Easy commands. Any suggestions about the best way to do this kind of thing would be most welcome!

Pachube and Yahoo Pipes part 1: show me the data

December 5, 2008 at 00:04 | In Ones and Zeros, Uncategorized | 3 Comments
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I’ve just been playing around with Yahoo Pipes for the first time in ages to see if it might be useful in mangling data feeds from Pachube. (Would have been useful to have tried this out before homecamp but never mind!) Early signs looked good- falling off a log looks difficult in comparison to getting Pachube data into a Yahoo Pipe. Having said that, finding data feeds to start working with is not so easy. If I want to start doing something with power data, I have to manually find the relevant feeds on the Pachube site with a tag search. It would be great to be able to get a feed of data feeds; that would be useful for keeping up with new data feeds that get added to Pachube as well as being a useful input to a Yahoo Pipe.

So the simple example pipe for part 1 does just this kind of aggregation except that, because it’s a hack, it only includes a specified set of feeds. The default user input list is just the feed IDs I manually copied from that tag search for ‘power’:

It should work using my API key if you don’t have one, but you’ll need your own if you clone the feed to do something more interesting.

Coming up in part 2: doing something useful with the data.

First Century

September 19, 2008 at 01:00 | In Uncategorized | 1 Comment
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Almost by coincidence (i.e. only slightly contrived after I noticed how close it was) this is the first anniversary of Notes from a small field and the 100th post! If you don’t like blog posts about blog stats, look away now!

  • First post: Hello world! on 19 September 2007, and I didn’t even write it!
  • Least popular post (not including this one!): Perranporth, Cornwall with 3 hits, which is a shame because the Ordnance Survey still do nice wallpaper pics
  • Most popular search term: “low power home server” 112 times
  • Busiest day: Thursday, July 31, 2008 with 306 hits
  • Total views: 8,994
  • Spam: 2,763 (all caught thanks to Akismet)

Luckily it’s not all numbers. Here’s my roundup from the past year/99 posts:

  • Favourite comment: if I’d have started this blog sooner, there would have been a lot of posts about fitting the kitchen!
  • Most useless post: iPhone accessibility (nobody seems interested, which is a shame- must try and catch up with Andy about trying it out on the touch screen kiosk in the ETS lab instead)

If you got this far, well done! If all goes to plan, I’ll have some cakes at my desk in Hursley to celebrate.

P.S. Aarrr!

Update: If you were working at home today/don’t work in Hursley, you missed out… yum…

Cake

Cake

Unpublished

August 20, 2008 at 21:26 | In Uncategorized | 1 Comment
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Since it’s a bit hard to follow that last post, I thought now would be a good time for an interlude. It may come as a surprise but I try and maintain the highest standards of content and editing on my weblog; no really! Some posts get cut completely, while others just hang around collecting dust on my drafts tab. Here are a few which might one day make it out:

  • Social radar
  • Even more ways to run MDM transactions
  • Command line usability
  • Favourite MDM sites
  • Are SOA and MDM inseparable?
  • Personal Master Data Management
  • Pervasive computing
  • Don’t ban carrier bags!
  • Random-bouts
  • Web 2.0.0.7
  • Marconi didn’t invent WiFi
  • Second Language
  • Quantum kettles
  • Recipe for a virtual world x: Physics
  • Recipe for a Virtual World x: way in
  • Recipe for a Virtual World x: money
  • Eternal September

Although, admittedly, perhaps not for some time! And finally, here’s one post that really is coming soon:

  • Another way to run MDM transactions in a development environment

Hello world!

September 19, 2007 at 17:29 | In Uncategorized | 9 Comments

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