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Raspberry Pi reveals the final PCB design for the $25 PC

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Re: Raspberry Pi reveals the final PCB design for the $25 PC

#51
post #28

Earlier quoted context omitted.

Difference is the iPhone has insane margins. You want to pay $35 or $100?

It's not the PCB that's expensive. It's the components on it.

That's often not true; PCBs can be a significant cost on the bill of materials for a gadget.

Amortising the tooling / artwork costs into big volumes helps, but even then the PCB is usually one of the more expensive items on the parts list.

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#52
post #48

Earlier quoted context omitted.

Sounds idyllic; but what are you going to run? The latest Office suite? Photoshop? Whatever you answer, the cost dwarfs the device, and swamps its processing power. So, we're talking about teaching kids to use some special kid-computer with software/tools they will never encounter ever again. What tools are these? A BASIC interpreter?

> Whatever you answer, the cost dwarfs the device, and swamps its processing power. Linux costs 0, and runs on far less capable devices than the RaspberryPi.

And is already ported:

"What Linux distros will be supported at launch? Debian, Fedora and ArchLinux will be supported from the start." (Raspberry Pi FAQ)

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#53
post #48

Earlier quoted context omitted.

Sounds idyllic; but what are you going to run? The latest Office suite? Photoshop? Whatever you answer, the cost dwarfs the device, and swamps its processing power. So, we're talking about teaching kids to use some special kid-computer with software/tools they will never encounter ever again. What tools are these? A BASIC interpreter?

> Whatever you answer, the cost dwarfs the device, and swamps its processing power. Linux costs 0, and runs on far less capable devices than the RaspberryPi.

So, Photoshop for linux? Mac dev tools? What apps?

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#54
post #18

Earlier quoted context omitted.

uh, you can run other OSs on Apple hardware. It's a little bit trickier because of EFI but it's not hard. What you can't do (Apple say) is run Apple OSs on non-Apple hardware.

I don't want the Apple OS. Remove it completely from the hardware, make the firmware more friendly to non-Apple OS, then I'll buy more Apple hardware. Other than NetBSD, I was not aware it's "easy" to run other OS's on Apple hardware. Knowing Apple, I'm still not sure I believe it. But I will investigate. Thanks for the FYI.

_I was not aware it's "easy" to run other OS's on Apple hardware. Knowing Apple, I'm still not sure I believe it._

I run linux (arch now, but once ubuntu) on a MacBook5,4. It's somewhat harder to get set up if you want to dual boot (the dual partitioning scheme is finicky, and although linux doesn't need it, OS X forces you to use it if there's a foreign OS, ugh..). See http://wiki.freebsd.org/AppleMacbook and https://help.ubuntu.com/community/MacBook .

Only one proprietary driver (for wireless) is needed - the rest Just Works. (And flash plays smoother than on OS X :P )

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#55
post #48

Earlier quoted context omitted.

> Whatever you answer, the cost dwarfs the device, and swamps its processing power. Linux costs 0, and runs on far less capable devices than the RaspberryPi.

So, Photoshop for linux? Mac dev tools? What apps?

Why don't you go look up Linux, that way I don't have to list tens of thousands of applications, including dozens of language implementations. If you want someone to learn software development, or computing in general, Linux is a far better starting point than Windows or OS X.

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#56
post #26

Why don't thes people release their files as they work on them? Why don't they resell the bare SoCs at cost or a slight markup so we can use them for other projects? Something has always struck me as fishy about this whole thing.

Why aren't they doing those things? Perhaps because that isn't what they set out to do:

We plan to develop, manufacture and distribute an ultra-low-cost computer, for use in teaching computer programming to children. We expect this computer to have many other applications both in the developed and the developing world.

How does selling SoCs at cost or a slight markup serve their aims? My guess, it doesn't.

What is fishy about that?

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#57

Cool. Portable. Cheap. Can run Quake II. But what does that get you? Still need to plug into a monitor, keyboard, mouse. So you can only use it where those things are. For real portability, how about an SD system thumb drive I can plug into any computer, and it boots as my computer. That would be portable. Useful for a student lab, at my Mom's house, in a hotel. Just a thought.

You seem to have fixated on the portability. Understandable, but I don't think that is the point. The point is to build a cheap but capable device that kids can hack on. The portability is a byproduct of that focus on cost: the fewer parts, the smaller the PCB, the cheaper it can be.

Keyboards and mice are pretty cheap these days. Monitors, not as much, but this can work with TVs, which are surprisingly common, even in the developing world.

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#58

If they think this PCB is "packed" they haven't looked hard enough at a smartphone teardown. Go look at the iPhone 4S teardown: http://www.ifixit.com/Teardown/iPhone-4S-Teardown/6610/2

They could have achieved higher density, but it would have been more expensive. The density is in service of low costs, so that wouldn't have made much sense.

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#59
post #51

Earlier quoted context omitted.

It's not the PCB that's expensive. It's the components on it.

That's often not true; PCBs can be a significant cost on the bill of materials for a gadget. Amortising the tooling / artwork costs into big volumes helps, but even then the PCB is usually one of the more expensive items on the parts list.

Yup, it was interesting reading some of the discussions about the design of the device. PCB cost was a major consideration. They aren't exposing some of the I/O pins on the SoC because it would require a more expensive PCB to do so.

Re: Raspberry Pi reveals the final PCB design for the $25 PC

#60

Earlier quoted context omitted.

It's not the PCB that's expensive. It's the components on it.

Custom small-time boards get expensive quickly when you shoot for tighter tolerances, which are necessary for truly tight spacing. If Raspberry Pi expects to sell 10 million units, then even a fancy board will cost nothing, but I doubt they are planning on such numbers...

Board design is expensive for small units - but assembly costs for complex boards don't drop very much with large numbers.

Especially if Apple have every super high-end pick and place robot booked for the next n years!

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