New Raspberry Pi Model B+ 202
mikejuk writes The Raspberry Pi foundation has just announced the Raspberry Pi B+. The basic specs haven't changed much — same BC2835 and 512MB of RAM and the $35 price tag. There are now four USB ports, which means you don't need a hub to work with a mouse, keyboard and WiFi dongle. The GPIO has been expanded to 40 pins, but don't worry: you can plug your old boards and cables into the lefthand part of the connector, and it's backward compatible. As well as some additional general purpose lines, there are two designated for use with I2C EEPROM. When the Pi boots it will look for custom EEPROMs on these lines and optionally use them to load Linux drivers or setup expansion boards. Expansion boards can now include identity chips that when the board is connected configures the Pi to make use of them — no more manual customization. The change to a micro SD socket is nice, unless you happen to have lots of spare full size SD cards around. It is also claimed that the power requirements have dropped by half, to one watt, which brings the model B into the same power consumption area as the model A. Comp video is now available on the audio jack, and the audio quality has been improved. One big step for Raspberry Pi is that it now has four holes for mounting in standard enclosures.
Much better board layout (Score:5, Informative)
The model B has a lot more thought into the board layout. Having the power, and HDMI all on the same side of the board and the optional I/O also all on one other side, makes so much more sense and will allow much cleaner looking enclosures. Although.. I still wish they had done even MORE thought and out the I/O on the OPPOSITE side of the board where they have all the GPIO pins.
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I would still like to see a line in.
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Re:Much better board layout (Score:4, Informative)
Agreed, stereo if possible, 48Khz sample rate even better...
Correction... 192 Khz sample rate would be *excellent*....
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The layout is mostly dictated by the pinout of the CPU. If you have a look at the schematics and board layout files you can see that in order to keep the number of layers down and density down they pretty much just routed everything outwards from that one part.
Micro SD (Score:3)
Like the move to micro-SD, always ended up using full-size SD adapters that just protruded needlessly from the side. I had one device damaged thanks to the SD adapter being knocked, damaging the board, and I know this has happened to many others.
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Can get 'short' micro-SD to SD adapters that barely protrude. I use them with the R-Pi, Chromebook, MacBook, and several other devices which do not need a full-length SD.
FYI the micro-SD goes in the side so is not removable while the adapter is plugged in.
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You Can make a Rasberry Pirate Radio (Score:3)
did i read about this here a few weeks ago?
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How small is small?
Once you go up to mini-itx there are loads of options but I sense that is rather bigger than you want to be.
The utilite standard and pro models (but not the value model) have dual ethernet but they are kinda pricy. Theres various hackable routers but they tend to be rather lacking in CPU power and storage (they make a Pi look postively high end by comparision)
The other option is to use an external USB ethernet adaptor.
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The best device for your purpose (torrent download device) is probably a Pogoplug Series 4. You can get them for $20 brand new from Amazon, and they have SD, GigE, SATA, 2xUSB3, a wall-wart and a case. Real-world performance on the GigE shoveling data from a USB3 disk is more like 200Mbps tops, but that's nothing to piss on for twenty bucks.
R-Pi is pointless if you're not using the GPU. It just has too many deficiencies. If you are using the GPU, the value is probably unbeatable. There are other options for
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Alix3d3 here goes for about $125. Specs lower than the pi for cpu and ram but it does seem like a potent board.
http://www.mini-box.com/Alix-3... [mini-box.com]
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I would second this. I've got a 2d3 I run OpenBSD on for a firewall, and it works pretty well.
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I'd love one with just one ethernet interface that was NOT on the USB bus. Performance of the already stressed CPU is bogged down with the ethernet being on USB.
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I'd love one with two Ethernet interfaces. Small boards with duel Ethernet seem pretty rare. Anybody know of one?
Just go get a USB Ethernet dongle and a USB hub if you don't have enough ports. The "on board" Ethernet is USB based to start with, so the rate limit of the USB port shouldn't be an issue....
I'm just wondering... Why do you want multiple NIC's? You building a router or firewall? If so, skip the Pi and pick up a cheap router that you can run OpenWRT (or some other distribution). You will be happier. Not that the Pi is a bad choice, I just think you'd get better results for a router/firewall using some
Real Time Clock? (Score:3)
Last I checked there was no RTC (Real Time Clock). Don't see any mention of timer chips?
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Last I checked there was no RTC (Real Time Clock).
So use NTP. By default debian launches with the -g opt.
If you're looking for hardware to operate a satellite site, spend a little more money. Get something with an RTC.
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Last I checked there was no RTC (Real Time Clock).
So use NTP. By default debian launches with the -g opt.
Only really of value when you have a network connection, which for embedded problems can be an issue.
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You are supposed to supply your own, or you can use NTP. The idea is to make you learn about computers, not hand you a feature complete system to start with.
Finally has mounting holes (Score:2)
Glad to see it finally has mounting holes! With a board mounted on top of the Pi, it was a pain to find an enclosure that would work for my projects.
DSP (Score:3)
Slashdot questions here: Has anyone on slashdot made an effects processor yet?
I've been toying with the idea of making a RPi based Effects processor. I primarily play guitar but am not going to differentiate between it and any other sound application. I've looked around and found 2 projects, one was "Guitar extended" http://guitarextended.wordpres... [wordpress.com] Which, I'm afraid, is a bit too "We're going to change guitar forever!" for me. I don't want to make yet another crazy sounding thing that no-one wants to listen to, that requires an insane peddle board to control. After I get some decent DSP reverb, gates etc... going, then I'll worry about foot controllers. The fact of the matter is, in most applications I don't need to mess with effects on the fly. I'd even argue that's a bad idea in general.
My main problem with retail effects is the size. Getting a decent processor usually means it's a double rack space unit. But if you open them up they could have easily fit into a half rack space. I'm guessing this is an appeal to the same part of the brain that likes SUVs. I build my own combo amps, so I'd like to throw in a half rack effects module and maybe something else. But all I've found is the Roland Vf1 which isn't that great, isn't in production anymore and sells for $200+ used. Also, hey I built the amp... why not the processor as well?
I've not really dove into it yet, I dont like to start these projects myself. It's way easier to let someone else make all of the mistakes and solve the problems for me :-) Also, it seems the RPi has audio latency issues like just about every non-firewire based computer out there. You can fix it, but it's a nightmare of driver and hardware tweaking. I've got a guide: http://wiki.linuxaudio.org/wik... [linuxaudio.org] But that sounds like the typical thing you have to do. That level of complexity is terrifying when you're trying to do a live situation. If you haven't ever played in front of people... God hates live performances... anything that can go wrong, will. I've had retail, $1000+ processors fail live and leave me to just pull the damn plug in the end and go raw.
I've seen some Arduino projects that use a DSP chip and the arduino swaps out code from the chip to change effects... but that sounds insanely error prone to me. I could pull it off, but I would never really trust it.
So if anyone has any experience in this area, or links to articles they've found on the topic, I'd love to see them.
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The latencys is entirely based on the chip. Most are designed for live applications so it's not really an issue. The thing with DSP chips is they don't really need to be all that powerful because they were designed for the specific application you're using them for. If I were you I'd look at the Arduino DSP shields that are out now. I can't really speak for them because I've not used them.
Here's an older one:
http://www.amandaghassaei.com/... [amandaghassaei.com]
Sounds awful though...
This ones a bit better, but still not that gr
PWM? (Score:2)
Does anyone know if the additional I/O lines include any hardware PWM pins? TFA doesn't say. The old RPi-B has only one PWM pin, which is insufficient for keeping two robot wheels in sync, running an X and Y axis on a CNC machine, etc. Even one more PWM would be great. A total of four would be better.
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You can use a software based solution that utilizes the PWM or PCM chip to generate pulses, and will let you drive 8 or more servos at a time: https://github.com/richardghir [github.com]... [github.com]
Software PWM is not going to give the same smooth movement, and will result in both audible hum and vibration. It is fine for dimming an LED, but not for precision motor control.
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Re:PWM? (Score:5, Informative)
Yes - we bring out both PWM outputs to the GPIO connector now.
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If you look at the pinout diagram from here: http://www.raspberrypi.org/blog/#introducing-raspberry-pi-model-b-plus [raspberrypi.org]
You will notice GPIO_GEN0->6. Perhaps those are 7 hardware PWM's.
But if not then go grab a PWM breakout board such as http://www.adafruit.com/products/1455?gclid=CN6MjrTKxb8CFSwS7AodhDYAcw [adafruit.com]
I have used their 16 channel PWM breakout and it was a pleasure to use.
USB Bandwidth & Power Problem (Score:2)
Re:USB Bandwidth & Power Problem (Score:4, Informative)
yes as long as your input power adapter is decent
the B+ can provide upto 1200 mA
see
http://www.raspberrypi.org/for... [raspberrypi.org]
Broadcom BCM2835 USB problems not fixable (Score:5, Informative)
The B+ redesign fixed the power problems, but not the core data loss.
The core problems of USB can't be fixed in B+, because the new board still uses the same old Broadcom BCM2835 SoC with its minimalist (only partial) USB controller. That's the reason for USB events being dropped when the ARM is busy and can't service the USB interrupts fast enough.
That SoC was never intended to support full USB operation on a general purpose computer, only light applications like plugging a flash drive into a set top box. Its use in Roku 2 is typical.
As a consequence of the SoC, the core USB problems won't disappear until a new SoC is chosen for a next generation Raspberry Pi.
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improvements (Score:2)
More power to the USB ports? (Score:2)
The addition of 2 extra USB ports is useless, unless they have changed the polyfuse set up to allow more power to be delivered to the ports. As things currently stand with the original model B, attaching anything more than a low-power keyboard to the Pi requires a powered hub -- the Pi itself can't deliver the required juice. It would be great if this restriction were lifted.
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So, still not up to the 2000mA that we expect from a modern USB2 port, then. Users will likely need a powered hub, so adding more ports was a waste.
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I assume you mean 4 x 500mA, or 500mA per port. So do you really have 500mA peripherals plugged into *every* USB port? Or are you expecting the Pi to support the USB charging spec? 'Cuz there are better ways to charge your phone...
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yes as long as your power supply is good it can supply lots of power to all teh ports see
http://www.raspberrypi.org/for... [raspberrypi.org]
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With a good 2A+ PSU, it seems the B+ can now supply up to a total of 1.2A over USB (compared to ~600mA with the older model B).
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I believe they said they fixed the USB power problems.
Great for GPIO and USB (Score:2)
Great for GPIO, power supply, and USB. My only real concern is that the ethernet port is on USB. If you're like me and prefer the stability of ethernet, be advised that using ethernet will not only be slower but it will tax the CPU since USB relies on CPU power to operate. Not that this would be much different from using USB WiFi adapters, but it's something to keep in mind about the Pi.
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Ill-named? (Score:3, Funny)
FYI: in Hungary, B+ is the abbreviation of "f*ck you". So you've made our day.
Finally they fixed some of their screwups (Score:2)
Lets be honest: The Raspberry Pi is designed by amateurs and has numerous problems. Most noticeable was the hugely unreliable USB and the atrociously faked audio-out. But things like that nobody could tell whether the GPIOs are actually 5V tolerant due to missing critical portions of the data-sheet and the decision for a closed-documentation chip in the first place are at best on high amateur-level. It seems they finally fixed at least a part of their screwups.
In addition, I found the Raspberry Pi "communit
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To quote wikipedia.
'Eben Christopher Upton is a Technical Director and ASIC architect for Broadcom.'
No mystery there then.
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Really guys, you update it but you do nothing about the processor or amount of RAM?!
Seriously, what do you expect for $35? They've done well to add the extra USB without raising the price (and, hopefully, removed the need to buy a powered USB hub which was the real dealbreaker with the old Pi).
The stated aim of the Pi was to always encourage people to muck around with programming and electronics without the risk of bricking an expensive PC. Its quite deliberately built down to a price, so letting the magic smoke out is never a big deal.
Devices like the Hummingboard and the BeagleBone Bl
Re:RPi? That overhyped underdimensioned joke alive (Score:4, Insightful)
The problem is that the Raspberry Pi looks like the second kind of device, because you can install Linux on it, plug in USB devices, hook it up to your TV, and do many other desktop / media centric things. However, due to certain constraints like the slow processor, small amount of RAM, slow I/O, and insufficient power for USB, it seems to fall short of what many people envision using it for. I guess you can blame the customers because they bought something that wasn't really meant to fulfill their needs. But you also have to look at the way the device is marketed and designed. Why put all these USB ports if you can't actually hook up a bunch of USB peripherals? Why put an HDMI port on the thing if you don't have the power to drive a 1080 desktop environment? Why run full Linux when you don't have enough power to run most Linux applications?
Don't get me wrong, I think the RPi is a great little machine, but I think that many people get disappointed with it because from the person who's inexperienced with it, it looks very much like it's trying to be a full desktop replacement, but then get disappointed when they find out that it's really just great for running embedded machines.
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I'd be interested in seeing a computer board with usb, gpio and hdmi and audio that runs linux for about the same price. Got a link?
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And whilst you're at it, where's the SSD, SATA, Thunderbolt, optical I/O, gigabit ethernet and built in Wifi?
It is quite obvious that the Pi is designed for a very specific price point; one that gets it into the most hands possible. Every dollar you add to the production cost, makes it much less likely to get into the hands of people who would otherwise not be tinkering with such things. If you need something more capable, look elsewhere, the Pi is not for you.
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So they update it, but... (Score:2)
Perhaps you're expecting it to do too much? Unless you have very modest needs, it isn't intended to be a desktop/laptop replacement.
Re:So they update it, but... (Score:4, Informative)
In case you case, the two major shortcomings are power related (try to hotplug a wifi dongle, say) and the non-dedicated ethernet.
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and there is plenty of RAM. No idea what you're trying to do with yours, running Windows on it?
Quite. If one grabs an RPi, sees the specs and tries to run a full blown desktop with heavyweight programs on it, it's going to suck. But that's not the fault of the RPi, that's the fault of the user.
The the real worls they work extremely well for a variety of tasks for which an armed and fully operational Linux computeris required, but where one doesn't really need the power to destroy whole planets.
Things I know
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I've tried it and it was beautiful. I have to assume you're trying to do something the hardware isn't capable of. It's fully capable of any sort of light computing tasks. It works well as a media machine. This in spite of the fact it was designed to be neither. It was designed to provide a low cost, low power, small and full featured computer board for educational use. At that purpose it's off the chain. People bitching because it wont transcode blue ray movies on the fly just pisses me off. If you
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Same. I've used OctoPi quite a bit which runs off Raspian. It works great.
Re:So they update it, but... (Score:5, Informative)
I've been running Raspbmc [raspbmc.com] (the most popular XBMC distro for Raspberry Pi) for a long time, and it has been excellent. It's small enough to be hidden behind my TV, and with an added remote control, offers one of the best user interfaces you'll find in a 'set top box'. Streams all my 1080p movies and TV shows flawlessly (*), and handles pretty much every codec under the sun. All for ~$40 (including HDMI cable, USB PSU, SD card and MPEG-2 license for hardware acceleration).
If you search for "Raspbmc" on YouTube, you'll see my experience is the norm. If you have any specific issues, post in the Raspbmc forums and someone will most likely sort you out. :)
As for Raspbian, I'm also running this on another Pi. It's certainly not going to replace x86 servers any time soon, but it certainly has its uses. Maybe your expectations are too high for a $35, 700MHz, 512MB machine?
* Apparently, it may struggle with some very high bit rate encodes, but I've yet to see this in practice and is unlikely to be an issue for most people.
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Streams all my 1080p movies and TV shows flawlessly (*)/
* Apparently, it may struggle with some very high bit rate encodes, but I've yet to see this in practice and is unlikely to be an issue for most people.
I can confirm. It chokes hard on any of my DTS audio'ed recordings.
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All I can say is, I have something in the region of 300 1080p movies, mostly H.264 encoded, all of which play with no trouble at all. Google it, YouTube it, there are countless people doing the very same thing.
If you're not just trolling, report your issue in the Raspbmc forums, ideally with a link to a sample video for others to test with. I'll quite happily test a video or two on my Pi if you supply some links.
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It does it about as well as anything under 200 dollars will. I've seen an occasional glitch on mine but it's rare. It'll not compete with a full blown media machine of course but it does extremely well. I have to admit I was amazed at what it can do. The only issue I had with mine was solved with a powered USB hub and it looks like the B+ fixes that problem.
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I completely disagree. I've been using a Model B with xbian for over 6 months now and it plays everything I throw at it flawlessly, even high bitrate 1080p h.264 videos. Sometimes the navigation can have a little latency, or transitions from one category to another (like switching from TV Shows to Movies on the main screen) can stutter or not be smooth, but I partially attribute that to my huge library and the underpowered CPU. The actual video playback itself is always flawless though. I was impressed when
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Well the specs were modest for ARM SoCs even by 2012 standards. Deliberately so, given the mission to produce a $35 computer.
A rpi 2 with Broadcom's quad core Cortex-a7 SoC would still be no speed demon compared to an iPad Mini but adequate to run, say, Gnome/KDE with all the bells and whistles. (Whether they can achieve the same price envelope...)
A $35 computer will never match a 'desktop replacement', if you're used to a Corei7 workstation but should just about surpass the P4 I'm typing this on in the nex
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It is intended to be an inexpensive experimenting and learning platform.
spoiled, wasteful. 2000X as much RAM as Arduino (Score:3)
Get off my lawn, ya spoiled brat. The Pi has 2000 times as much RAM as the Arduino Uno, a million times as much as a Picaxe.
It really isn't necessary to run Windows 8 for embedded^H^H^H^H^H^H^H^H^H any applications. You can run a full operating system with a GUI, web browser, and onboard server in 8 MB. How much more do you need?
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You call those shortcomings?!
The CPU is a few thousand times faster than any other microcontroller.
The RAM is 512 MEGABYTES - Most micros used in this same class have 32 to 128 KILOBYTES of RAM.
The PI is a moster powerhouse compared to any other microcontroller in its price class.
In fact the only boards that even compare are full blown embedded PC boards, which arguably is a class or two above what the Pi is targeted at (and cost way more than 2-3x still)
It's hardly the Pis fault you are trying to run a ful
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you could add the Wolfson Audio Card to the Pi and get all the audio support you could need from a pi
http://www.adafruit.com/produc... [adafruit.com]
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That's the thing about the Pi, the add-ons just keep rolling in. The community support is unbelievable.
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Tho the more financially viable alternative would be finding a decent/acceptable USB audio adapter for somewhere around $3-$5.
Perhaps Gamestop would give you a deal on PS3 and/or 360 microphones in quantity. They sell them for $10 in the shops. Apparently they only charge $1.99 for PS2 mics, which is fairly stellar.
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Can you not use a garden-variety USB audio adapter like any of these dozes of examples?
http://www.amazon.com/s/?keywo... [amazon.com]
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It is great indeed, because the ports are now aligned and the new cases won't look like deformed blobs of plastic.
Re:Slow CPU, crippled network, too little RAM (Score:4, Informative)
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Cases have always been problem with the Raspberry Pi. They didn't really think about cases when they designed it. It's almost as if they just expected people to have the board sitting unprotected on the desk. I like that they actually have mounting holes now, which should help things out a lot.
Technically, the old Model B had "mounting holes". Two of them, located in places that would really only work if you augmented them via some sort of edge or insulated under-support. The Pi box I have goes strictly for edge mounting, and it really doesn't do that well, although most of the fault is in the box design.
The B+ won't fit that old box, though. Not because of the changed port locations. Because the new card is slightly larger than the old one.
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The Pi box I have goes strictly for edge mounting,
it probably does that because the very first Model B rev 1 boards didn't have any holes in them.
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Re:Slow CPU, crippled network, too little RAM (Score:4, Informative)
Only if you think that adding a voltage regulator chip to your power supply is difficult. A 5v regulator, the 7805, costs about 50 cents a piece even when you buy them in very small quantities.
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Only if you think that adding a voltage regulator chip to your power supply is difficult. A 5v regulator, the 7805, costs about 50 cents a piece even when you buy them in very small quantities.
Okay, you will need two of them, two caps and a heat sink in order to make input current and cover USB peripherals. Or you could spend $5 on eBay and get a boost-buck converter that would let you run it on 3-35V or so. Hmm, I see you can get them for $4 now, I believe I spent $6 actually. $5.37 from a US seller in FL. You can get 5 pcs from China eventually for $11... Bet you can get them around $1/ea by the case off alibaba. So whether you're a hobbyist or have a serious project in mind, the cost of a DC-D
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Unless you're dead set on saving a few bucks, you're much better off getting little modules like this from a reputable source (with schematics, test results, and so on) than from fly-by-night eBay sellers. For example, here's a decent buck-boost [pololu.com] from Pololu that fits the bill and it's that much more expensive.
If you start looking hard at some of the anonymously produced and undocumented stuff that comes from China, you'll scream. You wouldn't believe some of the rookie mistakes made in the design of (some o
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Unless you're dead set on saving a few bucks, you're much better off getting little modules like this from a reputable source (with schematics, test results, and so on) than from fly-by-night eBay sellers.
If you weren't dead set on saving a few bucks, you wouldn't be using a Raspberry Pi. Especially the first one, which is filled with rookie mistakes.
For example, here's a decent buck-boost from Pololu that fits the bill and it's that much more expensive.
HAHAHAHA. I love that you accidentally dropped a word, and that made your comment dramatically more accurate. The modules you propose people should use are not only three times the price, but they're also non-variable* — they might be better-made, but they also have inferior specifications.
* No, you don't need a variable supply for Pi, but I like to buy s
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A 5v regulator, the 7805, costs about 50 cents a piece even when you buy them in very small quantities.
The problem is not going down to 5V, it's the problem of getting up. Three AA alkaline or NiMH cells will get you around a 3.6 - 4V working range. Lithium is 3.6-3.9V depending on exact chemistry. Therefore you need a boost circuit, and boost circuits waste power. It's not an insurmountable problem, but the wasted energy is not insignificant compare to what the RPi itself, using a tickless low power kernel, consumes.
Take a look at people running an RPi on solar power to see what I mean.
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bitch bitch bitch bitch bitch. buy a 5V 4400mAh. I bought 1 for ¥1300 which is just barely bigger than a case for 2 AA batteries which is more than enough of a pi backup.
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Re: Slow CPU, crippled network, too little RAM (Score:2)
If you use rechargeable batteries, four AA will be about 4.8v. Which may be close enough.
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"other input voltages than 5V are still not accepted"
Putting yet another regulator would increases the cost & complexity. Want to use it with a 12V supply? It's not like it's really hard to use a 7805.
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It's a hobbyist and education board. The amazing thing really is that it's used in a lot of industrial projects now which I think surprised the Rpi people. The problems pale beside the flexibility and low cost of the board. It's not perfect, I'm sure for another 100-200 dollars it could have been.
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...other input voltages than 5V are still not accepted, making battery powered applications unnecessarily difficult.
Yes, a range of, say, 5V to 15V would have been nice. But then they would have needed to add a 5V regulator that would be responsible not only for local regulation, but also for powering anything and everything attached to the four USB ports. Might be a bit much to ask of a small, inexpensive board.
I agree fully with your comment about using a micro USB connector for power though. That thing is awful, and it should be replaced with a real power connector.
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While note a "real" power connector, you can power the Rpi through the GPIO header [raspberrypi.org]. Works nicely.
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Don't read so much into it. Maybe people just have opinions. Relax.
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http://www.amazon.co.uk/gp/pro... [amazon.co.uk]
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With the existing LAN connection being USB based, I don't think they will fix this for you anytime soon.
If you wanted to go Fast Ethernet (100BT) then there are loads of options for you at this price point, many which can be had for next to nothing at garage sales if you know what you are looking for. Finding some used router that can run OpenWRT (or other firmware) will serve you much better than a Pi for any application I can imagine where you'd need two Gigabit NICs.
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With (true) dual Gbit LAN, I would use a boatload of these. Never mind, there are (more expensive) alternatives.
Mikrotik RouterBoard RB750GL is probably what you're looking for. More than 2 ports, and fairly cost-competitive with R-Pi when you account for a case.