Multi-orders being enabled?

Morgaine,

  Eben says he can't speak for Allied, which is the RS partner in the US.

It's funny he says he hopes Element14 will be able to ship multiple orders

soon.  In fact, there is already at least one report of Element14 shipping

two units to the same customer, user SN:

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=23&t=6400

and quite a few reports of people receiving one each from Element14 & RS.

In the same video, at about 17:35, Eben talks about PCB-level

changes being made to achieve FCC Class B certification.

He says it's pretty important not to ship millions into schools

without such certification.  I would expect he similarly wouldn't

want to ramp production for multiple-unit orders before Class B

was obtained.

Had we heard of Pi needing PCB-level changes for FCC Class B certification before this?

Morgaine,

> Had we heard of Pi needing PCB-level changes for FCC Class B certification before this?

liz on April 10, 2012 at 7:04 pm

said in page 3 of the comments to this article:

http://www.raspberrypi.org/archives/978

"Happily, we’ve found it doesn’t need a shielded enclosure to reach Class B,

although it will require a (very minimal) redesign."

JamesH on April 10, 2012 at 9:49 pm said:

"I don’t know yet, but I had assumed that meant a PCB redesign.

There isn’t much else that could be redesigned – it doesn’t come

with a power lead for example!"

As far as I know, Eben's video is the first official confirmation that

the "redesign" Liz mentions involves a PCB change.

Morgaine,

> Had we heard of Pi needing PCB-level changes for FCC Class B certification before this?

liz on April 10, 2012 at 7:04 pm

said in page 3 of the comments to this article:

http://www.raspberrypi.org/archives/978

"Happily, we’ve found it doesn’t need a shielded enclosure to reach Class B,

although it will require a (very minimal) redesign."

JamesH on April 10, 2012 at 9:49 pm said:

"I don’t know yet, but I had assumed that meant a PCB redesign.

There isn’t much else that could be redesigned – it doesn’t come

with a power lead for example!"

As far as I know, Eben's video is the first official confirmation that

the "redesign" Liz mentions involves a PCB change.

Interesting.  Well now's the time to make changes, as early as possible, and certainly before an educational release.  I just cannot understand all the secrecy though.  They have a serious problem in that area.

And while they're at it redesigning the PCB, the polyfuses need to be revisited, at the very least their trip currents raised so that their highly detrimental effect on voltage regulation is reduced.  Far better though would be to take the input to F1 and F2 from upstream of F3 so that they are no longer interdependent.

Morgaine.

I don't know if it is related, but having got a second Pi it seems a lot more stable than the first.

The first one I got (from the missing 8,000 (tm)) won't re-boot if it has been used for a while, I need to pull power for around 10 minutes or so before it is happy.

Second Pi from RS, with *exactly* the same things plugged into it will re-boot quite happily after pulling the power for 20-30 seconds or so.

Steve,

  There is a related thread here:

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=6957

including someone who says they have removed the monitor and

all usb devices, so that rules out quite a bit.  They suggest

possibly related to the SD card. 

That's what I thought originally (SD Card) but with my second Pi I am using everything the same, including the SD card so the only change is the Pi itself.

I'm thinking of using it as my 'interfacing' Pi, so when I (inevitably) blow it up accidentally, it will have given it's life for a noble cause.

Steve

Steve,

  It would be interesting to find out if element14 considers this normal behavior,

or if they consider it grounds for a replacement.

Similarly, I'd be interested to find out if they consider SoC and/or lan chips that

are hot to the touch normal behavior.  I believe Liz and Gert have said the chips

are supposed to be "warm", about body temperature, but not so hot that you

can't touch them for more than about 5 seconds as some have reported.

I'd also be interested to find out what the normal resistance is supposed to be

for the polyfuses.  I believe it has been said that they should be in the milliOhms,

but several people have reported 5, 6, and 7 Ohms for F1 and F2.

Steve Read wrote:

 

The first one I got (from the missing 8,000 (tm)) won't re-boot if it has been used for a while, I need to pull power for around 10 minutes or so before it is happy.

 

Second Pi from RS, with *exactly* the same things plugged into it will re-boot quite happily after pulling the power for 20-30 seconds or so.

This sounds very much that you're triggering one of the fuses. Those of course have subtle differences in exact triggering current.

If you need more than half a second of poweroff to reboot a 'pi there is something funny going on. Mine didn't reboot for the first time today. I'm getting better and better at powering off and on again within a short timeframe. So I must've hit the critical 300-500ms mark for the first time today. Now I know to keep it off for close to a second to reliably reboot it.