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by reiuyi
Sat Jan 21, 2012 8:26 pm
Forum: Other projects
Topic: Netbook Pi
Replies: 10
Views: 4390

Re: Netbook Pi

<t>Go for a HRD converter for the PSU, it'll work nicely with the li-ion battery pack. You can find these and many other DC-DC converters on ebay for a couple of dollars (hong kong/china). You'll probably have to look for a DC-DC converter that's built flat, so it'll fit inside the cramped space<br/...
by reiuyi
Sun Jan 15, 2012 12:53 am
Forum: General discussion
Topic: USB ports model A
Replies: 12
Views: 2961

Re: USB ports model A

<t>Tomo2k said:<br/> <br/> <br/> The micro-USB and 5V GPIO port pins are the only places the board can be safely powered from.<br/> <br/> The USB Host socket(s) (USB "A" type) can only supply current to a downstream device. You cannot* power the RPi from this.<br/> <br/> A USB hub does not ever powe...
by reiuyi
Sat Jan 14, 2012 3:16 pm
Forum: General discussion
Topic: USB ports model A
Replies: 12
Views: 2961

Re: USB ports model A

<t>It has been suggested a couple of times that using a good powered USB hub (with like a 2A ~ 2.5A supply) is better than using some random phone charger.<br/> <br/> Connecting the hub to a usb-port on the raspi (not the micro-USB) should provide both power to raspi and provide the connection betwe...
by reiuyi
Tue Jan 10, 2012 10:48 am
Forum: Off topic discussion
Topic: Power connector question
Replies: 2
Views: 1039

Re: Power connector question

<t>Chromatix said: <br/> <br/> <br/> Looks like surplus industrial equipment to me - especially given that incredible power delivery rating!  I've never seen that connector on any consumer or business equipment.<br/> <br/> FWIW, a standard ATX PSU also provides 12V and 5V (and some others) at high p...
by reiuyi
Tue Jan 10, 2012 12:37 am
Forum: Off topic discussion
Topic: Power connector question
Replies: 2
Views: 1039

Re: Power connector question

<t>A while back I bought a "HITACHI PPD5002" power supply from a local vendor for small cash for an unrelated hobby project. It had connectors I didn't really recognize (shown below). The issue was easily solved with a soldering iron and a new cable, though I do wish to know what this kind of connec...
by reiuyi
Sun Jan 08, 2012 1:12 pm
Forum: General discussion
Topic: Has a Device Tree been built for the Raspberry Pi.
Replies: 11
Views: 2300

Re: Has a Device Tree been built for the Raspberry Pi.

<t>I don't really understand what you're saying, though what I think you're asking is more details on the Raspi bootloader. The foundation has mentioned it several times that the SoC starts by letting the GPU execute proprietary binary which you will not get the sourcecode of nor may you apply backw...
by reiuyi
Fri Jan 06, 2012 8:31 pm
Forum: General discussion
Topic: A warning about fake-capacity SD Cards (and other flash-media)
Replies: 22
Views: 9254

Re: A warning about fake-capacity SD Cards (and other flash-media)

<t>I still don't understand why anyone would buy memory cards online. Go to your local photo kiosk, go to your local electronics store, go to your local supermarket and you're bound to find the newest memory cards for sharp prices! The prices aren't as good as they are on ebay you say, why is this? ...
by reiuyi
Thu Jan 05, 2012 2:02 am
Forum: HATs and other add-ons
Topic: Gertboard
Replies: 258
Views: 104714

Re: Gertboard

<t>Reading this thread makes me feel like the Gertboard is far from being released, unlike what the frontpage suggested a couple of weeks ago. I'd hate to see the Gertboard never getting finished, or ending up being stupidly expensive (for example, $100+ would be out of reach for most of the raspi t...
by reiuyi
Thu Jan 05, 2012 1:47 am
Forum: General discussion
Topic: How much sales do you think will raspi make?
Replies: 66
Views: 11637

Re: How much sales do you think will raspi make?

<t>Jessie said:<br/> <br/> <br/> After the PCB files are released and are on the internet Chinese companies will be able to make the product cheaper than $25 and make a bigger profit.  This may be a possibility in the beginning, but if it is viable they will find a way to make it cheaper and cut out...
by reiuyi
Thu Jan 05, 2012 12:58 am
Forum: Other projects
Topic: Ipad screen as screen for Raspberry Pi?
Replies: 15
Views: 28444

Re: Ipad screen as screen for Raspberry Pi?

<t>salamanteiga said: <br/> <br/> <br/> Just wondering...<br/> <br/> I have an old Vaio wich has a faulty motherboard but the screen is ok. Could I use that one with the Raspi?<br/> <br/> cheers<br/> <br/> <br/> Yes it is possible. Laptop screens most often use "LVDS", which is sort of a standard fo...
by reiuyi
Thu Jan 05, 2012 12:47 am
Forum: General discussion
Topic: Mind putting the 'faulty' boards up for sale?
Replies: 9
Views: 1698

Re: Mind putting the 'faulty' boards up for sale?

<t>Manabu said: <br/> <br/> <br/> The PCBs would be prettier if they made it red. But noo, it would be too expensive, so we get the boring green ones…<br/> <br/> PS: I'm not complaining, but red PCBs sure would be nice, if free.<br/> <br/> <br/> According to earlier posts, red circuit boards are mor...
by reiuyi
Wed Jan 04, 2012 11:51 pm
Forum: General discussion
Topic: Mind putting the 'faulty' boards up for sale?
Replies: 9
Views: 1698

Re: Mind putting the 'faulty' boards up for sale?

A bare PCB board should hang nicely on the wall as a very advanced form of modern art. I've seen CPU wafers being encased in glass and hung on the wall before. Though admittingly, CPU wafers are way prettier than PCB boards.
by reiuyi
Wed Jan 04, 2012 11:48 pm
Forum: General discussion
Topic: How much sales do you think will raspi make?
Replies: 66
Views: 11637

Re: How much sales do you think will raspi make?

<t>Hopefully the initial batch will not contain ridiculously large commercial orders from resellers (funnily called "distributors" yet they can create monopolies) or companies interested in using Raspi in commercial products. I can already imagine Wyse being interested in using Raspi to create stupi...
by reiuyi
Sun Jan 01, 2012 2:44 pm
Forum: General discussion
Topic: Can i use raspberry pi mainly for web browsing?
Replies: 62
Views: 24469

Re: Can i use raspberry pi mainly for web browsing?

<t>dattaway said: <br/> <br/> <br/> An old 100MHz 486dx computer on a dialup line running x-windows  under 16MB of memory can be faster than a modern computer.  It's all about managing resources effectively.  Sometimes layers upon layers of abstraction and rich content detracts from the original pur...
by reiuyi
Wed Dec 28, 2011 6:28 pm
Forum: Other projects
Topic: A supercomputer for £100
Replies: 36
Views: 25019

Re: A supercomputer for £100

<t>Sylvain said: <br/> <br/> <br/> 25 Rpi model B (for network) costs 875 $. Sorry but it is much more than a "regular" (linux) computer.<br/> <br/> For this price, you could have a 6/8 cores (AMD) computer with tons of RAM, a powerfull cuda GPU and all you need around that (case, PS …). More intere...
by reiuyi
Wed Dec 28, 2011 1:01 am
Forum: General discussion
Topic: A warning about fake-capacity SD Cards (and other flash-media)
Replies: 22
Views: 9254

Re: A warning about fake-capacity SD Cards (and other flash-media)

<t>The conclusion would be that buying locally is probably better for everyone. I have not yet seen fake cards in retail stores, and you can always return it with your receipt if it may ever occur there is a rotten apple. It makes absolutely no sense to buy memory cards online unless you're hikikomo...
by reiuyi
Sun Dec 25, 2011 1:43 am
Forum: Other projects
Topic: A supercomputer for £100
Replies: 36
Views: 25019

Re: A supercomputer for £100

Imagine a single standard midi-tower computer case with a 20A 5v supply, a good switch and about 25 raspberry pis. You'd have your very own cluster-computer to teach advanced programming on multi-computer level. It'd still be cheaper than a regular computer, yet it has 25 CPUs and 25 GPUs !
by reiuyi
Tue Dec 20, 2011 2:55 pm
Forum: Other projects
Topic: Convert an old ATX PSU to a power supply (for your r-pi)
Replies: 26
Views: 10134

Re: Convert an old ATX PSU to a power supply (for your r-pi)

<t>If I remember correctly, both 12v and 5v need some load for an ATX power supply to function correctly. Also, it's very much possible that (especially the cheap PSU's) will have like 33% efficiency below 100W, as the efficiency of an ATX PSU is not flat.<br/> <br/> I'd still find it cool if someon...
by reiuyi
Tue Dec 20, 2011 2:47 pm
Forum: General discussion
Topic: $35 RasPi vs $50 tablet ?
Replies: 82
Views: 24620

Re: $35 RasPi vs $50 tablet ?

<r>[quote]<B><s>[b]</s>Quote from Piw32 on December 18, 2011, 20:35<e>[/b]</e></B><br/> Fully agreed, but that was just Globalization Part one, now wages are rising very rapidly in China, in less than 10 years they will be no more competive, that has already begun for some products (textile, garemen...
by reiuyi
Sun Dec 18, 2011 7:57 pm
Forum: General discussion
Topic: $35 RasPi vs $50 tablet ?
Replies: 82
Views: 24620

Re: $35 RasPi vs $50 tablet ?

<r>Your forum topic has the title \"50$ tablet\", yet your posts talks about something that costs €72 excluding import tax. Do you realize this tablet costs >125$ once you finally have it in your hands? <B><s>[b]</s>That\'s 5 times the costs of a raspberry pi.<e>[/b]</e></B> The team has said it man...
by reiuyi
Wed Dec 14, 2011 1:02 am
Forum: General discussion
Topic: Performance
Replies: 35
Views: 8590

Re: Performance

<r>Comparing different processor architectures based on speed is pretty bad, you know. Certainly when involving Android, the java-based applications are quite noticeably slower (read: less efficient) than lower-level programming languages you could use on the raspberry pi..<br/> <br/> These absolute...
by reiuyi
Tue Dec 13, 2011 12:38 am
Forum: General discussion
Topic: HDMI input?
Replies: 10
Views: 4094

Re: HDMI input?

<r>Quote from aboaboit on December 12, 2011, 23:21<br/> Gah, of course :-/ Well, I suppose you can always hook up a DTV tuner via USB and you have a partial workaround.<br/> <br/> What I had in mind, though, is recording games and simulators without using a framegrabber on the console/pc connected t...
by reiuyi
Sun Dec 11, 2011 7:56 pm
Forum: Other projects
Topic: MoPI a Prototyping PCB for the PI
Replies: 13
Views: 2665

Re: MoPI a Prototyping PCB for the PI

<r>Quote from problemchild on December 11, 2011, 02:11<br/> This is a small prototyping board it actually was meant to fit underneath the 'PI and provides a location for an additional DCDC regulator and also some feet or stand offs to keep it's tootsies off the deck <E>;)</E>. This is the underside ...
by reiuyi
Sun Dec 11, 2011 1:40 am
Forum: Other projects
Topic: MoPI a Prototyping PCB for the PI
Replies: 13
Views: 2665

Re: MoPI a Prototyping PCB for the PI

I have no idea what that thing is, or how it's supposedly used, though I have that exact DC-DC stepdown lying around on my desk

Hong Kong truly is a great place to do some light shopping
by reiuyi
Fri Dec 09, 2011 4:16 pm
Forum: General discussion
Topic: Shipping in Envelop or Box ?
Replies: 27
Views: 3962

Re: Shipping in Envelop or Box ?

<r>[quote]<B><s>[b]</s>Quote from Petrakis on December 9, 2011, 15:58<e>[/b]</e></B><br/> Well I´ve read that if it´s labeled as GIFT you don´t get custom dutties [/quote]<br/> <br/> Ordering from Hong Kong huh.. the joys of eBay! This \"gift\" labeling is not true. You don\'t pay tax because it\'s ...

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