Does no one get us some infos?

Balderdash and poppycock.mung wrote:I have heard a rumor the entire pi team were at the production facility on tuesday making finalisation of the display production line.
Will the display be available within the next couple of weeks?
What price?
Please $25 would probably be perfect, I have the money waiting.
That rumour is complete cobblers.mung wrote:I have heard a rumor the entire pi team were at the production facility on tuesday making finalisation of the display production line.
Will the display be available within the next couple of weeks?
What price?
Please $25 would probably be perfect, I have the money waiting.
Weren't they having a game of shinty against the Sony team?mung wrote:I have heard a rumor the entire pi team were at the production facility on tuesday ...
... so a quantity of real money plus an amount of imaginary money ... $(a+ib) ... this might cause another banking crisisjamesh wrote:... it's a bit more complex than $25 ...
You'll be waiting a while then. $70 has been quoted by Eben as possible (but I think even that's low)mung wrote:Please $25 would probably be perfect, I have the money waiting.
too be fair, these days a shifty look or a loud sneeze could cause another banking crisis.Burngate wrote: ... this might cause another banking crisis
Best guess - something that is as cheap as the Foundation can make it. So cheaper than a lot of the 'competition'.mikerr wrote:You'll be waiting a while then. $70 has been quoted by Eben as possible (but I think even that's low)mung wrote:Please $25 would probably be perfect, I have the money waiting.
Thanks for the maths joke, that made me smile.Burngate wrote:... so a quantity of real money plus an amount of imaginary money ... $(a+ib) ... this might cause another banking crisisjamesh wrote:... it's a bit more complex than $25 ...
Like this? : http://cpc.farnell.com/raspberry-pi/rpi ... merch=true&mikronauts wrote:I think the first we will hear about the Pi display is when someone finds a listing for it on Element14 on a Friday...
Whats the problem with EMC?jamesh wrote:As above, there is a delay due to some EMC issues that need sorting out.As for the adapter board being available separately, I have no idea.
Like what?mung wrote:Like this? : http://cpc.farnell.com/raspberry-pi/rpi ... merch=true&
DirkS wrote:Like what?mung wrote:Like this? : http://cpc.farnell.com/raspberry-pi/rpi ... merch=true&
jamesh wrote:As above, there is a delay due to some EMC issues that need sorting out.As for the adapter board being available separately, I have no idea.
mung wrote:Like this? : http://cpc.farnell.com/raspberry-pi/rpi ... merch=true&mikronauts wrote:I think the first we will hear about the Pi display is when someone finds a listing for it on Element14 on a Friday...
I wonder weather there is a new raspbian coming with the required firmware blob?
Ummm... To the best of my knowledge, what is generally regulated is the MAXIMUM allowed RF power being radiated, rather than a minimum required. The mind boggles at the thought of a world where devices would be required to emit some level of RF. I suppose it would fit right in with 1984....or the desires of the NSA and GCHQ, I suppose. (Anybody else here remember when the NSA was so well hidden that those who knew of it would joke that the initials stood for "No Such Agency"?)mung wrote: Would be really great if the foundation put a story on the blog about how EMC testing is done, what is minimum radiation power and frequency allowed etc?
" I met a man upon the stair,W. H. Heydt wrote:. (Anybody else here remember when the NSA was so well hidden that those who knew of it would joke that the initials stood for "No Such Agency"?)
No unfortunately that doesn't actually help... The reason is that the DPI display has 24 signal lines that all transition up and down at the same time creating huge current spikes in the sources to those lines (i.e. the drivers in the conversion chip). The wires themselves will radiate some energy although it's unlikely they'll create a huge amount because they are so short. But those signals end up travelling out of the unit back down the power wire which tends to be around 2m long - perfect for some 100MHz type interference!mung wrote: They cannot just wrap the back of the screen in triple layer alloy foil and put some ferrites on the FFC?
Well I know nothing about electronics (in the grand scheme of things) so anything I say is probably wrong, but.gsh wrote:
No unfortunately that doesn't actually help... The reason is that the DPI display has 24 signal lines that all transition up and down at the same time creating huge current spikes in the sources to those lines (i.e. the drivers in the conversion chip). The wires themselves will radiate some energy although it's unlikely they'll create a huge amount because they are so short. But those signals end up travelling out of the unit back down the power wire which tends to be around 2m long - perfect for some 100MHz type interference!
To combat this we add decoupling capacitors and chokes to the board, unfortunately these are expensive and you have to be very careful where you mount them and how you route the signals otherwise you end up coupling the noise straight back into the supply cable. Unfortunately this means the process of creating a device like the display is complicated by the problems of having to iterate the design to reduce the noise. Of course if it was someone else making the board or some Chinese outfit they'd not care, but we have to be much more careful (and we're learning as we go!)
Gordon