The McKenzie's Blog…

I’ve been searching the net for ages looking for the wiring diagram of the 12VDC power cable for my Respironics REMstar Plus CPAP machine.

Not having any luck at all on the net finding the information I needed to build a cable, I’ve finally broken down and paid £26.00 (including shipping) to buy one.  I’ve wanted a DC cable mostly so that I could a) go camping without the need to have a tent pitch that was powered (extra cost), and b) be able to power my CPAP should we have a prolonged power outage at home (fairly low risk of this, but a risk none the less).

Click on the image below to see the full sized one.  This is a page from the manual that came with my cable.

Basically, should someone have posted something like:

To make your own Respironics Shielded DC Cord, Part number 1001956, you will need the following:

• 1 x 2.1mm (5.5mm outside) X 15mm Coaxial DC plug
  Such as: Maplin’s Part number HH61R (www.maplin.co.uk)
• 2-3m of suitable wire for a max of 7amp DC (depending on your CPAP model)
• 2-4 Clip on Ferrite suppressors, such as Maplin’s part N89AB
• 1 x 12VDC cigarette plug, suitable for upto 7amp DC

The construction of a DIY Respironics CPAP DC Cable, model number 1001956 is quite simple.  Wire up the cigarette plug to the DC plug that will go to the CPAP, be sure to wire the tip of the cigarette plug (Positive 12V, I suggest a multi-meter to confirm this in your car or battery pack you intend to use) to the centre connector of the 2.1mm DC plug.  Wire the negative to the other remaining connections. 

At both ends of the cable, as close as possible to each of the plugs, leave not much more then 3-4cm of cable “exposed” put a couple of the clip on ferrite RF suppressors.  These are quite important as they will ensure the dc is free of RF (Radio Frequency) or Electromagnetic noise.  These, should they get into the machine, could cause damage.  You can likely get away without them, but frankly for the extra £5 it will cost for these it’s worth saving your £500+ CPAP.

That’s all there is to it.  I really hope people find this useful, for some reason there has been a black hole of info about these cables, and I’m not sure why.

**DISCLAIMER** This information has been provided purely for theoretical and personal information.  I will not, nor can not, be held responsible if you are not competent enough to build this simple cable and end up damaging or destroying your CPAP.  I’m pretty sure in the wonderful lawsuit happy world we  live in it’s also most likely a violation of your warranty to attach a home made DC cable to your CPAP machine.  You have been warned, don’t come crying to me if you blow something up, also, don’t ask me to make one for you.  These are beyond simple to make.

On June 26 Lisa’s pre-school, Ladybird Pre-School, had a day out at Wicken Fen.  This is a National Trust owned Nature Reserve near Cambridge.

The weather couldn’t have been better for the day.. it was a little overcast, but that kept the heat down which was good.

(click to see full sized images)

You can see the rest of the pics taken yesterday by CLICKING HERE

Click to read on ….

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The BBC is reporting a bizarre incident where an Antarctic Fur Seal spent 45 mins doing the rumpy pumpy with what can only be described as an unwilling King Penguin..

Why the seal attempted to have sex with the penguin is unclear. But the scientists who photographed the event speculate that it was the behaviour of a frustrated, sexually inexperienced young male seal.

Read the full story here..

BBC NEWS | Science/Nature | ‘Sex pest’ seal attacks penguin

I found this while looking around for some new podcasts/vodcasts to watch.

Urban Forest 2.0, come from KQED in San Francisco. I’ve been listening to their NPR mp3 stream for a few weeks.. it’s quite an entertaining broadcast covering pretty much much everything imaginable.

I’m not a tree hugger by any means but I do like green space. One thing that really impressed me when I moved to the UK was how much green space they have in their cities, towns and villages. Every village it seems has a “village green”.. these are usually lined or ringed with trees along with a large area of grassy area. In a lot of villages they will have fairs or carnivals come and setup in these greens, as well as they will hold local events in them. You will have no doubt seen a number of pics from events we’ve been to in Cottenham on it’s village green.

KQED have a story about a new database that is trying to catalogue every tree in and around San Francisco, a monumental task to say the least. They’ve then stuck this on the net for all to access. From the KQED website they have the following to say.

In the past, San Francisco’s long-term urban forest planning was hindered because there was no way to share information, much less get the community involved. That’s all changed, thanks to a significant partnership effort between Friends of the Urban Forest, the City and County of San Francisco, and Autodesk. By working together and leveraging new technology – MapGuide Open Source – the project team has created an Urban Forest Map, which digitally pinpoints the location of each tree, maintains tree data in a consistent database, and offers web access to the tree data – key for maintenance and planting efforts. The community can get involved by posting photos and stories about their own trees that they plant and map online. With the launch of this collaborative effort and the support of the Mayor’s Office, a critical step has been taken to move San Francisco’s urban greening efforts forward.

Check out the video: