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by W. H. Heydt
Sat Jul 13, 2019 2:02 am
Forum: Off topic discussion
Topic: Building IoT Gateway with Raspbian Jessie on thingsboard
Replies: 5
Views: 339

Re: Building IoT Gateway with Raspbian Jessie on thingsboard

dreamincode wrote:
Fri Jul 12, 2019 1:43 pm
I installed Rasbian Jessie on Raspberry Pi 3.
Ummm... Why? Jessie is two generations out of date as Raspbian has now moved from Stretch to Buster.
by W. H. Heydt
Sat Jul 13, 2019 2:00 am
Forum: Off topic discussion
Topic: long live Rpi2b
Replies: 10
Views: 485

Re: long live Rpi2b

cjan wrote:
Sat Jul 13, 2019 1:53 am
since chromium update to -rpt5, now can play 1080p youtube on full screen smooth.
so stay Rip2b, and so long 3b 3b+ 4b :D
So...which version of the Pi2B are you using?
by W. H. Heydt
Sat Jul 13, 2019 12:19 am
Forum: General discussion
Topic: When are people in the U.S. getting their Pi 4s?
Replies: 108
Views: 3868

Re: When are people in the U.S. getting their Pi 4s?

I am so glad they kept and broke the 35 dollar threshold. Kudos to them for delivering a Pi 4 for that same 35 dollars. And a thumbs up to giving us the option to spend more to get more. I didn't mind spending extra to get extra RAM. :D And from what I'm seeing on the forums I'm not alone in that. ...
by W. H. Heydt
Fri Jul 12, 2019 4:34 am
Forum: General discussion
Topic: RPi4 chargers
Replies: 19
Views: 822

Re: RPi4 chargers

They are sold out everywhere ? none for sale in the US My local Microcenter had gobs of them last time I was there. Both colors. So, they are getting to the US. Ah...but will Microcenter take on-line orders for them? (For many of us there is no such thing as a "local" Microcenter. Nearest one to me...
by W. H. Heydt
Fri Jul 12, 2019 4:32 am
Forum: General discussion
Topic: RPi 4B - system architecture diagram?
Replies: 3
Views: 190

Re: RPi 4B - system architecture diagram?

Yeah...that's an obsolete block diagram of an Intel based PC. Even PCs don't really have northbridge or southbridge chips any more. For the Pi, the rough equivalents of most of what's there other than peripherals is all in the SoC. About the only major component that isn't is the system RAM.
by W. H. Heydt
Fri Jul 12, 2019 2:14 am
Forum: Advanced users
Topic: emacs 24 crashes under Raspbian stretch
Replies: 12
Views: 358

Re: emacs 24 crashes under Raspbian stretch

I'm a bit puzzled... The OP *just* switched from Jessie to Stretch? Isn't that...kind of behind the times as Raspbian has just switched from Jessie to Buster.
by W. H. Heydt
Fri Jul 12, 2019 1:04 am
Forum: Off topic discussion
Topic: Old fashioned fault finding....
Replies: 20
Views: 636

Re: Old fashioned fault finding....

Correct me if I'm wrong (likely), but 23Ah at 26v is 598watt hours of juice. Used in "a few seconds" I know old computers used a lot of power, but that's a LOT Read the article (especially note Fig. 14). The battery is only "on load" during a mains failure. In normal use the battery charger is prov...
by W. H. Heydt
Thu Jul 11, 2019 11:46 pm
Forum: General discussion
Topic: RPi4 - MicroSD card speed classes supported?
Replies: 17
Views: 1094

Re: RPi4 - MicroSD card speed classes supported?

chipace wrote:
Thu Jul 11, 2019 10:16 pm
If SD Express cards become more common (and cheaper), maybe the RPi4B+ could use that instead of regular SD. Is there an unused PCIe lane on the RPi4 SOC?
There is only one PCIe lane, and that lane is dedicated to the USB hub.
by W. H. Heydt
Thu Jul 11, 2019 4:26 pm
Forum: Beginners
Topic: Using pi to show images on connected HDMI
Replies: 6
Views: 194

Re: Using pi to show images on connected HDMI

Okay. Thank you. I will try it later. I also want to display videos. Is FBI also able to do this? Or do I need another media player? If yes, what do you suggest and do I then have to use X for that? Ah... You didn't specify videos (or I missed it). I believe that there is at least one video player ...
by W. H. Heydt
Thu Jul 11, 2019 4:22 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 108
Views: 10493

Re: Raspberry Pi 4 usb boot?

dickon wrote:
Thu Jul 11, 2019 9:48 am
Oh good. I'm not going entirely mad, then.
The quote the Cheshire Cat... "We're all mad here..." And if you aren't mad when you arrive, we can fix that.
by W. H. Heydt
Thu Jul 11, 2019 4:16 pm
Forum: General discussion
Topic: how long will it take for the Raspberry Pi 4 to be available everywhere?
Replies: 13
Views: 847

Re: how long will it take for the Raspberry Pi 4 to be available everywhere?

OK i wait for the usb-c Upgrade From what has been reported, it's going to be a while. In the meantime, any projects you have that could really benefit from a Pi4B will have to be shelved for an extended and unknown period of time. If you use the official PSU--which is quite inexpensive--there is n...
by W. H. Heydt
Thu Jul 11, 2019 5:43 am
Forum: General discussion
Topic: Will number of RPi 4s sold exceed previous generations?
Replies: 7
Views: 288

Re: Will number of RPi 4s sold exceed previous generations?

Might possibly exceed the RPi 3B, though I doubt it would exceed the RPi 1 series (RPi 1B/1A/1B+/1A+/Zero) as that even crashed the retail site on its release do to the large demand, and I think that is the largest number of RPi's sold (could be wrong). The Pi3s have almost certainly outsold the Pi...
by W. H. Heydt
Thu Jul 11, 2019 5:41 am
Forum: General discussion
Topic: Will number of RPi 4s sold exceed previous generations?
Replies: 7
Views: 288

Re: Will number of RPi 4s sold exceed previous generations?

Gavinmc42 wrote:
Thu Jul 11, 2019 5:10 am
I think nearly 30Million Pi's of all sorts have been made so far.
The last number I saw from someone who could be expected to know was 27 million.
by W. H. Heydt
Thu Jul 11, 2019 5:39 am
Forum: General discussion
Topic: external USB SSD to Pi 4
Replies: 11
Views: 650

Re: external USB SSD to Pi 4

When did using HD/SSDs become so hard to use? The problem is usually in the USB to SATA bridge chip. Not all of them play well with the Pi. I have hopes that the EEPROM will have the USB boot process refined over time as the bridge chips that don't play nice get identified and the peculiarities are...
by W. H. Heydt
Thu Jul 11, 2019 3:51 am
Forum: General discussion
Topic: how long will it take for the Raspberry Pi 4 to be available everywhere?
Replies: 13
Views: 847

Re: how long will it take for the Raspberry Pi 4 to be available everywhere?

On the other hand, your Pi 3Bs have an unusual blue PCB. Are they manufactured in Brasil? Since that has come up, yes, the RPF/RPT arranged for a Brazilian manufacturer to supply that market because of the extremely high import duties that would otherwise apply. I haven't heard if they are making P...
by W. H. Heydt
Thu Jul 11, 2019 3:35 am
Forum: Beginners
Topic: Using pi to show images on connected HDMI
Replies: 6
Views: 194

Re: Using pi to show images on connected HDMI

FRom the description of what you're trying to do, you appear to have over-thought it. Install "fbi" and read the man page that goes with it.
by W. H. Heydt
Thu Jul 11, 2019 3:32 am
Forum: Beginners
Topic: fun idea pi4 as a gpu?
Replies: 4
Views: 194

Re: fun idea pi4 as a gpu?

I would think it would be possible, but it might be difficult to do if software that does that doesn't already exist. You would also need to find a way to get the pi to act as a USB slave rather than a USB host. The power port can be configured as USB client, but it's only USB 2. You can't configur...
by W. H. Heydt
Wed Jul 10, 2019 11:07 pm
Forum: Beginners
Topic: Is it a true ground?
Replies: 5
Views: 195

Re: Is it a true ground?

Using the RPi expansion header as the ground return path for something high current is a really bad idea and a good way of burning out traces or melting connectors. The return path for your external higher voltage/current devices should be a dedicated lead from your board to the PSU powering them. ...
by W. H. Heydt
Wed Jul 10, 2019 11:03 pm
Forum: General discussion
Topic: Charger compatibility with the Pi 4 (Single Type C CC resistor on Pi4)
Replies: 28
Views: 3062

Re: Charger compatibility with the Pi 4 (Single Type C CC resistor on Pi4)

Almost as bad as putting an EEPROM on a Pi. Or a Mondeo engine in a Volvo. Have you done that then? I knew someone who put a 2 litre twin cam Fiat engine in a Reliant Kitten. Not many Reliants could wheel spin from standstill in third gear and hit 125 mph in fifth :-) That technique used to be call...
by W. H. Heydt
Wed Jul 10, 2019 8:28 pm
Forum: General discussion
Topic: PI4b image
Replies: 2
Views: 121

Re: PI4b image

Ti85 wrote:
Wed Jul 10, 2019 8:20 pm
Would an older raspbian image work with the new PI4b (like 2016 era)? Or does it have to be the most current image with Buster?
General rule: to run any Pi, you need a system image that was released at the same time that model was released, or later.
by W. H. Heydt
Wed Jul 10, 2019 6:31 pm
Forum: General discussion
Topic: PI4B and Raspbian challenge - Use as main computer a fortnight.
Replies: 31
Views: 1373

Re: PI4B and Raspbian challenge - Use as main computer a fortnight.

Nice idea, but it won't work for me. My recreation is an on-line MMO that is capable of using nearly 4GB and only runs on x86 hardware. Even the Mac version has been migrated to use WINE instead of having a native client. So for that Pi4B is right out. I am, however, considering migrating pretty muc...
by W. H. Heydt
Wed Jul 10, 2019 6:27 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 108
Views: 10493

Re: Raspberry Pi 4 usb boot?

epoch1970 wrote:
Wed Jul 10, 2019 12:45 pm
This being said, I want to add some background noise to the EEPROM discussion.
I have no idea how resilient it is, how big it is etc.
It's been stated several times... 512KB.
by W. H. Heydt
Wed Jul 10, 2019 6:23 pm
Forum: General discussion
Topic: Charger compatibility with the Pi 4 (Single Type C CC resistor on Pi4)
Replies: 28
Views: 3062

Re: Charger compatibility with the Pi 4 (Single Type C CC resistor on Pi4)

These "e" cables are not just cables. They have some kind of micro-chip in them. No idea what it does, something to do with deciding to blast your Pi with 20v and 100amps as if it were fast charging an iPhone or not. Grief who invents this garbage? Power leads with chips in them, ridiculous. I've b...
by W. H. Heydt
Wed Jul 10, 2019 3:46 pm
Forum: Off topic discussion
Topic: Got too many raspberries?
Replies: 25
Views: 1110

Re: Got too many raspberries?

To paraphrase from archy and mehitable with regard to the thread title...

There ain't too many Pis. There ain't hardly enough.
by W. H. Heydt
Wed Jul 10, 2019 3:40 pm
Forum: General discussion
Topic: Raspberry and electricity
Replies: 16
Views: 816

Re: Raspberry and electricity

Meowzlodey wrote:
Wed Jul 10, 2019 3:23 pm
Can I do auto-on somehow? I don't think that cheap ups is good idea.
IIRC, the MoPower Pi UPS can restart the Pi after a power outage. Basically, it contains a microcontroller to do that.

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