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by simpex
Thu Feb 19, 2015 10:13 pm
Forum: General discussion
Topic: Is it true that 1/2 million Raspberry Pi 2 have been sold?
Replies: 37
Views: 4666

Re: Is it true that 1/2 million Raspberry Pi 2 have been sol

CPC Farnell - Raspberry Pi 2 units in stock
Thu Feb 19, 2015, 6:33 pm - 1543 units
Thu Feb 19, 2015 8:59 pm - 1527 units
Thu Feb 19, 2015 10:13 pm - 1523 units

The new prediction is 5.45 units sold / hour which means 1831 in 14 days.
by simpex
Thu Feb 19, 2015 9:45 pm
Forum: General discussion
Topic: Is it true that 1/2 million Raspberry Pi 2 have been sold?
Replies: 37
Views: 4666

Re: Is it true that 1/2 million Raspberry Pi 2 have been sol

Statistically the hypothesis of a new stock that arrived in the meantime is unlikely. We can check the stock in a few hours, three times tomorrow, etc. and you will see that the figure decreases continuously. The idea that new stock arrives a few times a day for days in a row, and by an extraordinar...
by simpex
Thu Feb 19, 2015 8:59 pm
Forum: General discussion
Topic: Is it true that 1/2 million Raspberry Pi 2 have been sold?
Replies: 37
Views: 4666

Re: Is it true that 1/2 million Raspberry Pi 2 have been sol

CPC Farnell Thu Feb 19, 2015, 6:33 pm - 1543 Raspberry Pi 2 units in stock Thu Feb 19, 2015 8:59 pm - 1527 Raspberry Pi 2 units in stock see: http://cpc.farnell.com/raspberry-pi/raspberrypi-2-modb-1gb/sbc-raspberry-pi-2-model-b-1gb/dp/SC13793 This means that CPC Franell sells 6.57 Raspberry Pi 2 / ...
by simpex
Thu Feb 19, 2015 6:33 pm
Forum: General discussion
Topic: Is it true that 1/2 million Raspberry Pi 2 have been sold?
Replies: 37
Views: 4666

Re: Is it true that 1/2 million Raspberry Pi 2 have been sol

When l go on the Farnell site it tells me the pi is supplied by cpc (part of Farnell) tried them? Yes, this is a good idea. CPC Farnell has 1543 Raspberry Pi 2 units in stock. I simply wrote 2000 units and press BUY and the site returned just 1543 in stock. see: http://cpc.farnell.com/raspberry-pi/...
by simpex
Thu Feb 19, 2015 6:01 pm
Forum: General discussion
Topic: Is it true that 1/2 million Raspberry Pi 2 have been sold?
Replies: 37
Views: 4666

Re: Is it true that 1/2 million Raspberry Pi 2 have been sol

Raspberry Pi 2 - Basic Starter Kit Availability: In stock. $69.95 Source: http://www.canakit.com/raspberry-pi-2-basic-kit.html That will cost me at least 90$ if I order one kit. Where exactly can I find Raspberry Pi 2 boards with no accessories? Somebody says he bought a Raspberry Pi 2 from Farnell ...
by simpex
Thu Feb 19, 2015 6:57 am
Forum: General discussion
Topic: Is it true that 1/2 million Raspberry Pi 2 have been sold?
Replies: 37
Views: 4666

Re: Is it true that 1/2 million Raspberry Pi 2 have been sol

Raspberry Pi Model B+
https://www.sparkfun.com/products/12994
1,092 in stock

Raspberry Pi 2, no unit at Sparkfun, they have never sold this model, same as in the case of Farnell UK.

It is a bit strange!
by simpex
Thu Feb 19, 2015 6:30 am
Forum: General discussion
Topic: Is it true that 1/2 million Raspberry Pi 2 have been sold?
Replies: 37
Views: 4666

Is it true that 1/2 million Raspberry Pi 2 have been sold?

Raspberry Pi 2 sales top 500,000 in two weeks Exclusive Eben Upton tells us that latest model already accounts for one in 10 sales By Dave Neal, Wed Feb 18 2015, 15:49 EBEN UPTON, the head of the UK computing success story that is the Raspberry Pi Foundation, has told The INQUIRER that the new Rasp...
by simpex
Wed Feb 18, 2015 12:21 am
Forum: Off topic discussion
Topic: A 2 inches Mini PC that runs ANDROID 4.4 KITKAT like a phone
Replies: 29
Views: 9298

Re: A 2 inches Mini PC that runs ANDROID 4.4 KITKAT like a p

" Intel's Compute Stick is an entire PC in a $149 HDMI dongle " http://iq.intel.co.uk/wp-content/uploads/2015/02/Compute_Stick_03-1024x370.jpg " The Compute Stick is an entire PC crammed into a small-ish HDMI dongle. Inside you'll find a quad-core Bay Trail Atom processor, 2 GB of RAM and 32 GB of ...
by simpex
Mon Feb 16, 2015 6:35 pm
Forum: Off topic discussion
Topic: A 2 inches Mini PC that runs ANDROID 4.4 KITKAT like a phone
Replies: 29
Views: 9298

A 2 inches Mini PC that runs ANDROID 4.4 KITKAT like a phone

A 2 inches $120 - $150 Mini PC powered by ANDROID 4.4 KITKAT, like a smartphone, and capable to run applications from Google Store (https://play.google.com/store/apps?hl=en) " The CuBox-i is compatible with Android and currently runs Android 4.4 KitKat. It is one of the official firmwares that you ...
by simpex
Mon Feb 16, 2015 12:00 am
Forum: Beginners
Topic: Raspberry Pi 2 Boasts Appetizing Price, Windows 10 Friendly
Replies: 1
Views: 470

Raspberry Pi 2 Boasts Appetizing Price, Windows 10 Friendly

Raspberry Pi 2 Boasts Appetizing Price, Windows 10 Friendly By Christian de Looper, Tech Times | February 14, 2:40 AM " Currently the device supports a number of different Linux-based operating systems, however as mentioned before it will soon also support Windows 10. Raspberry Pi has been working ...
by simpex
Wed Feb 11, 2015 4:36 am
Forum: General discussion
Topic: is flash nand chip more reliable than sdcard
Replies: 7
Views: 3034

Re: is flash nand chip more reliable than sdcard

Raspberry Pi should have a RAM Disk to transfer the OS from the SD Card in a RAM partition, when the board is powered, and then the OS should run from RAM till a shut down command is given that will save various changes, made in the RAM partition, back to the SD Card. SD cards are simply not suited ...
by simpex
Wed Feb 11, 2015 2:55 am
Forum: General discussion
Topic: is flash nand chip more reliable than sdcard
Replies: 7
Views: 3034

Re: is flash nand chip more reliable than sdcard

I hope that Raspbian and other operating systems, that run on Raspberry Pi, do not read and especially write all the time the SD card as Windows does on a Hard Disk.
by simpex
Wed Feb 11, 2015 2:27 am
Forum: General discussion
Topic: is flash nand chip more reliable than sdcard
Replies: 7
Views: 3034

Re: is flash nand chip more reliable than sdcard

I heard people's OS image got corrupted on sdcard. Is Nand chip more robust. I never heard BIOS being corrupted on Nand flash chip. A SD Card is a NAND flash chip! A BIOS is usually a NOR flash chip. It can be read as easily as a RAM (unlike SD Cards) but when it comes to write operations after abo...
by simpex
Mon Feb 09, 2015 10:39 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

Laser's should by definition not diverge at al. So they should have the same intensity across the entire dot A Gaussian beam emitted by a Helium-Neon laser hitting a screen. http://cache2.asset-cache.net/gc/128620433-gaussian-beam-emitted-by-a-helium-neon-laser-gettyimages.jpg?v=1&c=IWSAsset&k=2&d=...
by simpex
Mon Feb 09, 2015 10:32 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

Raspberry Pi 2 can easily come close to a halogen lamp (http://www.homedepot.ca/catalog/halogen-bulbs/172459) that likely will cause it to either freeze or reset... You might want to test your data-surmised hypothesis. By shining one of those lights on a Pi 2 for example Luckily, I do not have a Ra...
by simpex
Mon Feb 09, 2015 8:41 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

I made no confusion regarding the solar irradiance. I simply used both units, mW/cm2 and W/m2. 135 mW/cm2 (sunlight) is well above 4 mW/cm2 (the reset level)! Secondly, http://www.silabs.com/Support%20Documents/TechnicalDocs/AN0878.pdf does not say the CSP packed circuit, reset there under halogen l...
by simpex
Mon Feb 09, 2015 6:11 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

It appears that circuits inside CSP packages are upset by irradiances as low as 4 mW/cm2 (direct sunlight > 100 mW/cm2) Not only Xenon flashes or Laser Pointers can cause ICs inside CSP packages to malfunction but continuous halogen light with irradiances ranging from 4 to 30 mW/cm2 (well below the...
by simpex
Mon Feb 09, 2015 5:25 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

Speed of moving the dot is irrelevant - the point is that as the dot hits the edge, there is an instant increase in light (providing it's a decent laser). One moment unlit, next moment lit. Speed is relevant because the laser dot does not present a constant intensity across its entire surface. The ...
by simpex
Mon Feb 09, 2015 3:25 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

Of all the constant light sources, direct sunlight produces the most pronounced change in 1v2 core voltage (which is to be expected with a massively broad-band, high intensity source) but this is far more benign than the instantaneous change caused by a xenon lamp. The discharge time for a lamp is ...
by simpex
Mon Feb 09, 2015 3:10 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

If the watchdog is active, does Raspberry Pi 2 always reset after being illuminated with strong light sources that cause glitches to that U16?
by simpex
Mon Feb 09, 2015 2:44 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

Die Schatzjaeger wrote:As far as I tested the (hardware) Watchdog does it's job.
Then why does Raspberry Pi 2 freeze, after being illuminated with a Xenon Flash or Laser Pointer, without resetting and starting to run its code again?
by simpex
Mon Feb 09, 2015 2:33 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

jamesh wrote:The sun is VERY bright in Cambridge at the moment...
And have you tried to suddenly (not little by little) expose Raspberry Pi 2 to direct sunlight? (Windows reflect the infrared radiation so they have to be opened if you are indoors.)
by simpex
Mon Feb 09, 2015 2:08 pm
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

" Other bright lights – even camera flashes using other technologies – won’t set it off. You can take your naked Pi 2 in the sunshine for a picnic or take it to a rave, and it’ll be perfectly solid. " Source: http://www.raspberrypi.org/xenon-death-flash-a-free-physics-lesson/ I am not fully convince...
by simpex
Mon Feb 09, 2015 1:32 am
Forum: Troubleshooting
Topic: Why is the PI2 camera-shy ?
Replies: 162
Views: 265141

Re: Why is the PI2 camera-shy ?

Both Xenon Lamps and TV Remotes have near infrared spectra. see: http://www.raspberrypi.org/forums/viewtopic.php?p=688609#p688609 and http://en.wikipedia.org/wiki/Light-emitting_diode Far infrared is out of question. It is too distant. see: http://en.wikipedia.org/wiki/Far_infrared Secondly, the one...

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