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by bradburts
Sat Mar 31, 2012 8:21 am
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

<t>If you have a SunnyBoy inverter then you could drive a secondary relay from the SunnyBoy relay. The SB relay is programmable and can be turned on when PV>some threshold.<br/> <br/> You will need an electrician to install whichever solution you go for so. The SB relay solution would save you the c...
by bradburts
Thu Mar 22, 2012 7:55 pm
Forum: Other projects
Topic: Raspberry Pi Sunshine
Replies: 42
Views: 7447

Re: Raspberry Pi Sunshine

I stand corrected.

PS (just in case) I am actually typing whilst seated.
by bradburts
Tue Mar 20, 2012 10:04 pm
Forum: Other projects
Topic: Raspberry Pi Sunshine
Replies: 42
Views: 7447

Re: Raspberry Pi Sunshine

It was not a snipe, rather a statement of fact.

Its not easy to get a Pi and I wish I had one.

PS & I have been waiting since Oct
by bradburts
Tue Mar 20, 2012 7:15 pm
Forum: Other projects
Topic: Raspberry Pi Sunshine
Replies: 42
Views: 7447

Re: Raspberry Pi Sunshine

Good post, looks like the SMA interface is well covered.

If only getting a PI were so easy......
by bradburts
Mon Mar 19, 2012 8:17 pm
Forum: Other projects
Topic: Raspberry Pi Sunshine
Replies: 42
Views: 7447

Re: Raspberry Pi Sunshine

<r><URL url="http://www.on4akh.be/SMA-read.html">http://www.on4akh.be/SMA-read.html</URL> says he has interfaced to the SB.<br/> <br/> I also saw a post on <URL url="http://openenergymonitor.org/emon/">http://openenergymonitor.org/emon/</URL> but you will have to find that yourself.<br/> <br/> Let m...
by bradburts
Wed Mar 07, 2012 7:22 pm
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

Sounds great.

Would be very interested to read & crib when you're ready.
by bradburts
Wed Mar 07, 2012 8:20 am
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

<t>Sounds good Ian.<br/> <br/> Which RF dongle did you use in the end? Does that dongle do the IR as well?<br/> <br/> I ended up getting an Arduino and 433MHz module. Objected to the price of the ready built USB RF modules. The RF side will cost me £14 and half a life time of coding to go :)<br/> <b...
by bradburts
Sun Jan 22, 2012 10:45 am
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

Some good links.

Think your Pi case/psu costs are a little inflated.

Whats the £40 thermostat controller for?

I will be doing something similar, once we have a PI be good to share notes.
by bradburts
Thu Jan 19, 2012 8:55 pm
Forum: Other projects
Topic: Boards plugging into GPIO should be Male or female?
Replies: 14
Views: 3094

Re: Boards plugging into GPIO should be Male or female?

This came up in another post.

If it can cause a spark then its female

Think shorts, think static.

Owltim is right, its often worth using female & female and plug together using headers.

There is no right or wrong, so long as it fits!
by bradburts
Thu Jan 19, 2012 3:07 pm
Forum: General discussion
Topic: Easy GPIO Hardware & Software
Replies: 133
Views: 50193

Re: Easy GPIO Hardware & Software

Female, absolutely.

Some of the pins are current sources, you don't want those shorting. The rest will kill your chip if they get zapped with static.

In general terms; if it can cause a spark then its female 
by bradburts
Thu Jan 19, 2012 11:13 am
Forum: General discussion
Topic: Raspberry pi for an old blind lady (with remote)
Replies: 19
Views: 7840

Re: Raspberry pi for an old blind lady (with remote)

<t>Tomo2k said: <br/> <br/> <br/> There are quite a few USB-connected Big Buttons available that enumerate as generic HID.<br/> <br/> <br/> Would you post some link plz?<br/> <br/> This project is very doable, been working on it for a while.<br/> <br/> I am left looking for a way to avoid soldering ...
by bradburts
Thu Jan 19, 2012 10:55 am
Forum: General discussion
Topic: Backing up SD card
Replies: 12
Views: 3884

Re: Backing up SD card

<r>As mentioned copying won't work.<br/> <br/> DD is the Linux way & as Gert shows there is a Win32 version.<br/> <br/> There is a simplier way though:<br/> <br/> <URL url="https://wiki.ubuntu.com/Win32DiskImager">https://wiki.ubuntu.com/Win32DiskImager</URL><br/> <br/> which I would guess uses ...
by bradburts
Tue Jan 17, 2012 3:49 pm
Forum: General discussion
Topic: How to protect the filesystem without a save shutdown button?
Replies: 61
Views: 26938

Re: How to protect the filesystem without a save shutdown button?

<t>JamesH said: <br/> <br/> <br/> Well, I haven't trashed my SD card on my alpha board, and I was pressing the power button all the time on that at fairly random intervals. I don;t think I have ever issued the 'shutdown' command. I think the problem is being massively overstated.<br/> <br/> Backup y...
by bradburts
Tue Jan 17, 2012 2:16 pm
Forum: General discussion
Topic: How to protect the filesystem without a save shutdown button?
Replies: 61
Views: 26938

Re: How to protect the filesystem without a save shutdown button?

<t>My experience of embedded systems is that: 1) you can destroy the disk if power is lost during the write and 2) a lot of development effort can go into protecting that disk.<br/> <br/> As stated FTL and wear leveling mean that you don't know where the data is.<br/> <br/> Its important to minimise...
by bradburts
Fri Jan 13, 2012 2:19 pm
Forum: General discussion
Topic: Petition the government to "Change import duty rules to encourage British manufacturing"
Replies: 79
Views: 14421

Re: Petition the government to "Change import duty rules to encourage British manufacturing"

<t>I had a quick look shortly after Liz posted.<br/> <br/> As far as I could gather the import duty on some components was around 2.5%.<br/> <br/> My quick reading however was that the duty on many electronic components was 0%.<br/> <br/> It was just a scan read but I gained the impression that most...
by bradburts
Mon Jan 09, 2012 3:57 pm
Forum: General discussion
Topic: How to launch the RPi GUI
Replies: 18
Views: 6665

Re: How to launch the RPi GUI

<t>I really don't see the argument. Everything is possible.<br/> <br/> You can easily create a custom configuration yourself.<br/> <br/> Personally I don't want the overhead of a GUI for most of my projects so I would simply disable the GUI loading. I assume that it will be a little easier than on W...
by bradburts
Sat Jan 07, 2012 10:33 am
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

<t>Thanks.<br/> <br/> I get it now.<br/> <br/> Connecting the Arduino TX pin to the chip's DOUT was really confussing me until I figured that we would be doing the encoding on the Arduino!<br/> <br/> As best I can understand the SC5262 output provides (sinks??) 3mA @5V.  Think that we need to buffer...
by bradburts
Sat Jan 07, 2012 10:09 am
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

<t>The GPIO speed should be fine.<br/> <br/> Its likely that we would have to 'halt' other OS functions whilst RF transmitting, but that should not take long. Wonder if we can run the SPI chip at the required baud rate, then we could buffer and let the OS run free.<br/> <br/> I am sure that we can d...
by bradburts
Sat Jan 07, 2012 9:32 am
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

<t>Excellent links.<br/> <br/> This should port really well.<br/> <br/> I have not run down a detailed hardware description/manual for the modules yet. The photo seems to show just one pin used for TX and another for RX.<br/> <br/> Any HW experts here who can advise on connecting this directly to th...
by bradburts
Sat Jan 07, 2012 9:31 am
Forum: Other projects
Topic: Controlling a mains power socket switch? (home automation)
Replies: 174
Views: 59132

Re: Controlling a mains power socket switch? (home automation)

<t>Excellent links.<br/> <br/> This should port really well.<br/> <br/> I have not run down a detailed hardware description/manual for the modules yet. The photo seems to show just one pin used for TX and another for RX.<br/> <br/> Any HW experts here who can advise on connecting this directly to th...
by bradburts
Fri Jan 06, 2012 7:27 pm
Forum: Other projects
Topic: PiCard - GUI SD Preparation Tool
Replies: 268
Views: 74280

Re: PiCard - GUI SD Preparation Tool

Liam, you won't have any time after January................................

(or at least I hope that its no latter than January)
by bradburts
Fri Jan 06, 2012 6:59 pm
Forum: Other projects
Topic: PiCard - GUI SD Preparation Tool
Replies: 268
Views: 74280

Re: PiCard - GUI SD Preparation Tool

<t>A script to resize the disk would be doable in the timescales and would help those too scared by the manual.<br/> <br/> The differencing idea is logistically challenged, are you going to update the difference files for each distro each time the distro changes?<br/> <br/> You could automate but th...
by bradburts
Fri Jan 06, 2012 5:30 pm
Forum: Other projects
Topic: PiCard - GUI SD Preparation Tool
Replies: 268
Views: 74280

Re: PiCard - GUI SD Preparation Tool

<t>What I am struggling with is the view that the official Foundation distribution image will not resize itself.<br/> <br/> I imagine that if this is so then its a resource constraint and a script could be written & offered.<br/> <br/> I am also not getting the 'but' in the Liz/Eben quote, nor t...
by bradburts
Fri Jan 06, 2012 4:37 pm
Forum: Other projects
Topic: PiCard - GUI SD Preparation Tool
Replies: 268
Views: 74280

Re: PiCard - GUI SD Preparation Tool

<t>Wanted to check that you knew that was is the case (its not obvious from your posts).<br/> <br/> So your answer to my original question 2) is..............?<br/> <br/> Or to put the question another way, short of writting a differencing tool and merging files, how would the distro manufacturer ex...
by bradburts
Fri Jan 06, 2012 4:21 pm
Forum: Other projects
Topic: PiCard - GUI SD Preparation Tool
Replies: 268
Views: 74280

Re: PiCard - GUI SD Preparation Tool

Have you tried using DD with an unformatted/wrongly formatted card?

For example 1) DD an FAT, ext3 disk, 2) Format disk to FAT, 3) Restore orginal DD.

What happens?

Then question 2) of my previous post.

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