Kitz Forum
Computers & Hardware => Other Technologies & Hardware => Topic started by: roseway on February 27, 2016, 06:47:55 PM
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It's expected to have built-in WiFi and Bluetooth Low Energy support.
http://linux.softpedia.com/blog/raspberry-pi-3-to-come-with-built-in-wi-fi-and-bluetooth-le-first-photos-leaked-501065.shtml (http://linux.softpedia.com/blog/raspberry-pi-3-to-come-with-built-in-wi-fi-and-bluetooth-le-first-photos-leaked-501065.shtml)
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I like the sound of bluetooth being integrated into the RPi motherboard though my pound shop dongle seems happy with mouse and keyboard it was a pain in the arse to setup on previous firmware but later on new firmware had made it very easy.
Could do with a wee bit more CPU grunt on the B+
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Saw this from CPC today ....not available on the website yet
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more info
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more info
RPi3 B for £26 that is way lower than the RPi1 B+ which was £40 with case :o
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+ VAT (5.36)
TOTAL £31.66
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+ VAT (5.36)
TOTAL £31.66
Well i'll be buying one once it's released to general public I have nothing but admiration for the RPi and once you have used one your hooked low power consumption and low maintenance it's a dream come true :)
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Looks like it's launching on Monday morning - Pimoroni are doing a live "Bilge Tank" Youtube broadcast at 7am that day.
Looking at the pictures of the board online, there's a couple of curious things - the power and activity LEDs have moved from top left to bottom left, and in their place there's a rectangular grey object that has some text printed next to it, but can't make out what it says.
And underneath the board there's a connector that seems to be for a strip ribbon cable like the camera module cable, only narrower. The connector has perhaps 8 tracks running to it. My initial thoughts were some form of SATA but as it's immediately below the HDMI connector, maybe it's an alternative form-factor HDMI connector.
Ian
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I'm sure you can't fail to have seen the specs of the new Pi 3 model B, as launched today.
One interesting feature that hasn't had much attention yet, is mentioned here :
"A minor change, which will help those who use attach drives to the Pi, will be the ability for the Pi 3 to boot directly from a USB-attached hard or pen drive - rather than having to boot from an SD card. Similarly Pi 3 will also support booting from a network-attached file system, using PXE, without the need for boot data on an SD card - something Upton forsees being useful for boards used for factory automation."
from this article
http://www.techrepublic.com/article/raspberry-pi-3-the-inside-story-from-the-new-35-computers-creator/ (http://www.techrepublic.com/article/raspberry-pi-3-the-inside-story-from-the-new-35-computers-creator/)
I watched the launch videos / livestreams / conferences etc this morning with interest, largely dismissing any need to have a Pi 3 as I've several Pi 2 and B+ doing useful things, which seem fast enough for my needs.
I caved in around 11am and ordered a Pi3 kit from Pimoroni :-[
It'll replace my Pi 2 desktop; will be interesting to see how much faster it is; eg web browsing is acceptable on the Pi 2 if you're not in a hurry. GIMP graphics package loads faster on the Pi 2 than on my Windows PC!
Ian
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GIMP graphics package loads faster on the Pi 2 than on my Windows PC!
That's probably due to the Pi using Linux :cool:
Stuart
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GIMP graphics package loads faster on the Pi 2 than on my Windows PC!
That's probably due to the Pi using Linux :cool:
Stuart
Hmm maybe :hmm:
Realistically, I think it's more about it being Linux software that's been ported to Windows by someone who doesn't know enough about Windows.
I don't mean that as a criticism per se, GIMP is a marvellous piece of software, and the fact it's been ported at all to Windows is of great merit.
It's just it's loading time (and some of the quirky bugs) suggest a need for better Linux / Windows understanding that I certainly don't have.
I like Windows. I like Linux (even though it scares me)
Ian
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Still using the RPi 1 B+ and upgraded raspbian wheezy to Jessie and notice a slight increase in performance imagine how Jessie will perform with a Quad core processor @ 900Mhz :wry:
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Still using the RPi 1 B+ and upgraded raspbian wheezy to Jessie and notice a slight increase in performance imagine how Jessie will perform with a Quad core processor @ 900Mhz :wry:
Pi 2 is 900Mhz
new Pi 3 is 1200Mhz!
It flies along (mine arrived today)
And gets quite hot.
It's the first pi where a heatsink is a sensible option, mine was at 70C earlier when I was trying it out.
Ian
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Pi 2 is 900Mhz
new Pi 3 is 1200Mhz!
It flies along (mine arrived today)
And gets quite hot.
At 1.2Ghz then it's going to need some sort of heatsink & a small fan if it's hitting 70C to dissipate the heat the RPi 1 never went above 38C under load
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https://www.raspberrypi.org/blog/
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This is an interesting Web page that discusses the CPU thermals on the new RPi3
http://makezine.com/2016/03/02/raspberry-pi-3-not-halt-catch-fire/ (http://makezine.com/2016/03/02/raspberry-pi-3-not-halt-catch-fire/)
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This is an interesting Web page that discusses the CPU thermals on the new RPi3
http://makezine.com/2016/03/02/raspberry-pi-3-not-halt-catch-fire/ (http://makezine.com/2016/03/02/raspberry-pi-3-not-halt-catch-fire/)
That's interesting; I saw a page of thermal images on the day Pi 3 was launched (possibly the ones being referred to here) and it was indeed showing the CPU running at just over 100C.
It's claimed that the processor will throttle to keep it below this even under 100% load.
I've just been watching the latest "Bilge Tank" youtube, from Pimoroni who do all sorts of Raspberry Pi (and others) accessories, they were showing a Pi 3 running a stress test and testing it's temperature.
[youtube]https://www.youtube.com/watch?v=dW-9o-REfuk[/youtube]
It's 50 minutes long and rambles a bit, but I rather like it.
In summary - they got it up to 100C without a heatsink but it was throttling it's clock speed to stop itself getting any hotter. A heatsink dropped the temperature a fair bit.
My Pi 3 (under moderate load in desktop right now) is running at 55C without a heatsink.
Ian
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I've been doing a bit of tinkering with a Pi 3, both with and without a heatsink. My pi 3 correctly throttles when it gets to around 80C, as such I never saw the temperature rise much above 83C.
Looking at different articles, I notice different ways of measuring CPU clock speed, and I think that might have caused some confusion.
Either of these commands shows you the current CPU speed. If the Pi is fairly idle, it'll show a lower speed, if the processor is busy, it'll show it runnig at top speed.
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
BUT it won't show the effect of CPU speed throttling when the CPU is getting too hot.
To see that, you need to use this command
/opt/vc/bin/vcgencmd measure_clock arm
I wrote a short script, called Check.sh, thus :
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
/opt/vc/bin/vcgencmd measure_clock arm
/opt/vc/bin/vcgencmd measure_temp
cat /sys/class/thermal/thermal_zone0/temp
I then set sysbench running in the background, loading all 4 of the Pi 3's cores.
watch sudo ./Check.sh
let me watch the CPU speed and temperature climb.
Although I didn't plot or record the temperatures, I can confirm that :
Without a heatsink, the Pi 3 will quickly reach 80C under full CPU load (constant 100%)
With a heatsink, it takes longer to reach 80C, but will still reach it under constant 100% load.
Once the temperature reaches around 80C, the CPU frequency does get throttled back to prevent the temperature rising much higher.
With a desk fan positioned about a metre away blowing air in the Pi's vicinity, the Pi 3 with a heatsink never reached 80C under constant 100% load.
So in extreme cases perhaps a heatsink and a fan would be useful, athough it didn't seem to need much airflow to cool it.
But, realistically, is your Raspberry Pi 3 going to be under constant 100% CPU load?
I'm currently using the Pi 3, with the heatsink, NO fan, overclocked to 1300Mhz ;D , and the temperature is hovering around 56 - 60C.
Ian