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by hippy
Mon Jan 23, 2012 6:40 pm
Forum: For sale
Topic: Master Plug Dual USB Power supply 70% off Sainsburys
Replies: 46
Views: 22760

Re: Master Plug Dual USB Power supply 70% off Sainsburys

<r>Sainsbury's cheap PNY cards are in packaging very similar to this ...<br/> <br/> <URL url="http://www.mcmelectronics.com/.....2115_2.jpg">http://www.mcmelectronics.com/.....2115_2.jpg</URL><br/> <br/> Can't miss the 4GB as are 'Raspberry Pi apt "shocking pink" 8GB bright blue. In my local store t...
by hippy
Mon Jan 23, 2012 10:05 am
Forum: General discussion
Topic: Power consumption (final)
Replies: 8
Views: 4603

Re: Power consumption (final)

<t>lazybum said: <br/> <br/> I suppose the fuse is at the PSU side, giving a max of 1 A for the entire system. <br/> That is correct, between the micro-USB power inlet socket and the GPIO power pins / rest of the system - hence Abishur's suggestion of it being possible to bypass the 1A fuse by suppl...
by hippy
Mon Jan 23, 2012 12:46 am
Forum: General discussion
Topic: Frambozenbier - The raspberry homebrew community
Replies: 45
Views: 9215

Re: Frambozenbier - The raspberry homebrew community

<t>Turbo-Frambozenbier said: <br/> <br/> These forums are intended to provide practical information about Building, Developing and Sharing information about the Raspberry Pi, in addition to the more "general discussions" that go on in this forum.<br/> Looks like it will be an excellent resource.<br/...
by hippy
Sun Jan 22, 2012 2:05 pm
Forum: For sale
Topic: Master Plug Dual USB Power supply 70% off Sainsburys
Replies: 46
Views: 22760

Re: Master Plug Dual USB Power supply 70% off Sainsburys

<t>Sainsbury's are also selling a Masterplug mains plug with a single USB socket at £4.99 and is more clearly stated as 5V @ 1000mA but still doesn't indicate if it will supply 1000mA always or only when that's been negotiated. Also, if I remember correctly, it's marked "charger" so no idea how it w...
by hippy
Sat Jan 21, 2012 8:36 pm
Forum: Other projects
Topic: Boards plugging into GPIO should be Male or female?
Replies: 14
Views: 3230

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

<r>S0litaire said: <br/> <br/> <br/> Would it be crazy to suggest that you have male pins on the top and female connectors on the bottom at the same time?<br/> <br/> <br/> Assuming we're not just carrying on the "on top, ooer missus" banter; no, not crazy. You'd use what are called stacking headers,...
by hippy
Sat Jan 21, 2012 8:32 am
Forum: General discussion
Topic: Copyright and licenses
Replies: 38
Views: 6075

Re: Copyright and licenses

<t>kme said: <br/> <br/> <br/> @several above.<br/> <br/> The Berne Convention is utterly useless in court as it doesn't help to sort out who is the author or owner the copyright of a given file/program.<br/> <br/> A file without a copyright notice can be claimed by anybody.<br/> <br/> <br/> But tha...
by hippy
Sat Jan 21, 2012 12:52 am
Forum: General discussion
Topic: Copyright and licenses
Replies: 38
Views: 6075

Re: Copyright and licenses

<r>kme said: <br/> <br/> But my point is that anything without a copyright notice is public domain. Period. <br/> Many people seem to believe that but it's simply not true where the Berne Convention applies. Section 2 which automatically gives copyright to the author "without formality".<br/> <br/> ...
by hippy
Fri Jan 20, 2012 6:51 pm
Forum: General discussion
Topic: Copyright and licenses
Replies: 38
Views: 6075

Re: Copyright and licenses

<r>All I can say is that for works covered by the Berne Convention the situation is as stated in that convention ( linked to in an earlier posting ). Additional information on Software Copyright within the EU can be found here -<br/> <br/> <URL url="http://www.innovaccess.eu/docu.....0.xml.html">htt...
by hippy
Fri Jan 20, 2012 4:09 pm
Forum: General discussion
Topic: Copyright and licenses
Replies: 38
Views: 6075

Re: Copyright and licenses

<t>spurious said: <br/> <br/> What law gets broken if I write some code and let people have it and don't put the words Copyright... or Licence...<br/> In this case is it not public domain by default?<br/> <br/> <br/> No law gets broken. You automatically own the copyright in the work you create and ...
by hippy
Fri Jan 20, 2012 11:24 am
Forum: General discussion
Topic: Copyright and licenses
Replies: 38
Views: 6075

Re: Copyright and licenses

<t>bredman said: <br/> <br/> 3. We must agree on a single license. I recommend GPLv3 as a modern license which enforces software freedom, but is still compatible with educational and commercial use.<br/> We don't have to agree on a license and I doubt that everyone could or would.<br/> <br/> It woul...
by hippy
Thu Jan 19, 2012 9:57 pm
Forum: Other projects
Topic: Boards plugging into GPIO should be Male or female?
Replies: 14
Views: 3230

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

<t>It's hard to have any definitive answer; depends on how you want to use it and even what money you are prepared to spend.<br/> <br/> Female for avoiding shorting and inserting cables makes sense. Male if you want to connect via IDE cables. If you have one R-Pi and lots of boards to plug in, femal...
by hippy
Thu Jan 19, 2012 8:49 pm
Forum: HATs and other add-ons
Topic: Gertboard
Replies: 258
Views: 108766

Re: Gertboard

<t>Bakul said: <br/> <br/> As for errors zippy is running into, C++ has stricter type conversion rules than C. Use a C compiler, not a C++ compiler, if possible.<br/> Yes, was running the g++.exe not the gcc.exe ! Switched to gcc and orginal code compiles without error. I'm going to have to read up ...
by hippy
Thu Jan 19, 2012 8:40 pm
Forum: HATs and other add-ons
Topic: Gertboard
Replies: 258
Views: 108766

Re: Gertboard

<t>rurwin said: <br/> <br/> if ((gpio_mem = (char*)malloc(BLOCK_SIZE + (PAGE_SIZE-1))) == NULL) {<br/> gpio_map = (char *)mmap( …. );<br/> <br/> Many thanks, and it now compiles without complaint.<br/> <br/> As you can tell, I'm not much of a C programmer, only used it as a macro assembler on 8-bit ...
by hippy
Thu Jan 19, 2012 8:13 pm
Forum: HATs and other add-ons
Topic: Gertboard
Replies: 258
Views: 108766

Re: Gertboard

<r>Many thanks Gert.<br/> <br/> I'm having trouble cross-compiling ( ARM and X86 ) using the Codesourcery C++ Lite gcc setup ... Any C - Posix experts in the house ?<br/> <br/> gpio.c<EMOJI seq="1f4af">:100:</EMOJI>53: error: invalid conversion from 'void*' to 'char*'<br/> if ((gpio_mem = malloc(BLO...
by hippy
Tue Jan 17, 2012 6:47 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 154067

Re: BASIC - more harmful than useful?

<t>JamesH said: <br/> <br/> And yet Kernigan and Ritchie introduced the K&R style of curly bracket indentation,. which is a crime against humanity. And any aliens as well. Nobody's perfect.<br/> Agreed IMO, but at least a C compiler will accept whatever style the programmer decides is appropriat...
by hippy
Tue Jan 17, 2012 2:09 pm
Forum: General discussion
Topic: Order placed, Very Excited!
Replies: 52
Views: 18982

Re: Order placed, Very Excited!

<t>plrw said: <br/> <br/> <br/> Unless the manufacturer decided they wanted to sell it to others as well it"s probably a rip-off.<br/> <br/> <br/> Given the foundation seemingly has no prohibition on reselling R-Pi ( see FAQ and forum discussions ) I don't see that as reasonable grounds to label it ...
by hippy
Tue Jan 17, 2012 12:15 pm
Forum: General discussion
Topic: Order placed, Very Excited!
Replies: 52
Views: 18982

Re: Order placed, Very Excited!

<t>I frequently see articles I recognise from 'pound shops' sold with massive mark-ups at car boot sales, on eBay and even in other shops, and I suppose if people are prepared to pay then fair enough.<br/> <br/> It can be worth paying a mark-up when buying other things if it gets the shipping costs ...
by hippy
Mon Jan 16, 2012 7:19 pm
Forum: Other projects
Topic: why not use the wiki?
Replies: 49
Views: 9357

Re: why not use the wiki?

<t>Power ratings should also be updated. I'd also change that to "power consumption".<br/> <br/> From the GPIO page; "Maximum permitted current draw from the 5v pin is the USB input current (usually 1A) minus any current draw from the rest of the board, or about 650 mA", so that's saying the board c...
by hippy
Mon Jan 16, 2012 7:09 pm
Forum: Other projects
Topic: why not use the wiki?
Replies: 49
Views: 9357

Re: why not use the wiki?

"Expansion boards (shields)"

It might be a good idea to find an alternative name for R-Pi expansion boards as "shield" brings a lot of preconceived notions ( size, format, pinout ) from the Arduino world which is not applicable to the R-Pi.
by hippy
Sun Jan 15, 2012 3:46 pm
Forum: General discussion
Topic: Battery Powered Pi
Replies: 9
Views: 2773

Re: Battery Powered Pi

<t>Gert said: <br/> <br/> <br/> There are numerous posts about battery operation. Just want to mention here (again) the following: Beware that the boards as they come from the factor are price optimized not power optimized. You will get lower poser consumption if you replace the 1V8 regulator with a...
by hippy
Sun Jan 15, 2012 3:32 pm
Forum: Other projects
Topic: Tailor-Made Programming Language
Replies: 49
Views: 11304

Re: Tailor-Made Programming Language

<t>Chromatix said: <br/> <br/> <br/> I am aware that there are major pitfalls when designing a syntax, and I hope to avoid them from the outset.<br/> <br/> <br/> I think having an coherent whole is the most important part of any language; that it's consistent within itself and one part doesn't jar w...
by hippy
Sun Jan 15, 2012 2:04 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 154067

Re: BASIC - more harmful than useful?

<t>tufty said: <br/> <br/> programming is based on mathematics.  Not easy mathematics, but really quite hard mathematics.<br/> I think it's that impression ( which has been around for decades ) is one of the things which discourages people from embarking on computer sciences because, if they find "r...
by hippy
Thu Jan 12, 2012 6:40 pm
Forum: General discussion
Topic: Fragmentation
Replies: 34
Views: 8062

Re: Fragmentation

Tomo2k said:

Unix uses Carriage Return only, while DOD uses Carriage Return and Linefeed.
To be pedantic; doesn't *nix use linefeed (0x0A) ?
by hippy
Tue Jan 10, 2012 3:00 pm
Forum: General discussion
Topic: RCA Port
Replies: 10
Views: 2670

Re: RCA Port

Abishur said:

How much power is sent down an video RCA port? 
Note sure that can really be expressed in any meaningful or useful way but CVBS is usually around 1V p-p into 75R so that's approximately 13mA max, and 1V * 13mA = 13mW.
by hippy
Mon Jan 09, 2012 12:49 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 154067

Re: BASIC - more harmful than useful?

<t>tufty said: <br/> <br/> It seems that even the BASIC fans are coming around to the idea that BASIC simply isn"t good enough as it stands, and could bear some improvement.<br/> In the sense of K&R C being superseded and C++ being a development upon C and other languages' evolution then it can ...

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