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by mahjongg
Mon Mar 30, 2020 1:19 pm
Forum: Troubleshooting
Topic: Bug in package bluez 5.50-1.2~deb10u1 massive bluetooth range loss
Replies: 9
Views: 220

Re: Bug in package bluez 5.50-1.2~deb10u1 massive bluetooth range loss

The PM disabling is due to legal rules.

I have posted about this on a place where other moderators (including Jamesh) will hopefully see it.
by mahjongg
Mon Mar 30, 2020 8:50 am
Forum: General discussion
Topic: raspberry pi 4 with problems
Replies: 25
Views: 842

Re: raspberry pi 4 with problems

harry747 wrote:
Sun Mar 29, 2020 10:28 pm
This pi is ***** me off with all the problems. I'm starting to regret buying that piece of junk :-(
Please moderate your language, or I have to sensor it.
by mahjongg
Sun Mar 29, 2020 10:55 pm
Forum: Troubleshooting
Topic: Raspberry 4B doesn't boot from 32GB sd
Replies: 12
Views: 265

Re: Raspberry 4B doesn't boot from 32GB sd

The canonical answer for this problem is that you are using a SD-card programmer that is NOT completely compatible with 32GB cards and doesn't support SDXC cards, only SDHC cards. Any cheap programmer you buy these days, even cheap ones, should be capable of handling SDXC, but the one built in somew...
by mahjongg
Sun Mar 29, 2020 10:14 pm
Forum: Advanced users
Topic: Is it possible to make Windows programs run on raspberry pi 4?
Replies: 7
Views: 224

Re: Is it possible to make Windows programs run on raspberry pi 4?

So I wonder, is it able to run Windows programs on raspberry pi like using Wine? Or is it other softwares to make it possible? The short but definitive answer is NO! , and that has nothing to do with the number of bits its instruction set is using (32 or 64-bit) and as you yourself already stated, ...
by mahjongg
Sun Mar 29, 2020 9:59 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 559
Views: 179119

Re: Raspberry Pi 4 usb boot?

I read. But People tell that after implement network boot. But it was implemented... But implementation usb boot nothing change What was said that after finishing network boot the software engineer would -start- on the USB boot code. I gave you seven days off to think about "Not annoying our commun...
by mahjongg
Sun Mar 29, 2020 2:23 pm
Forum: Advanced users
Topic: How to measure 2 specific resistor values by GPIO?
Replies: 1
Views: 70

Re: How to measure 2 specific resistor values by GPIO?

Not impossible, you can create a setup where the specific resistance tied on one end to a voltage (12V) charges up a capacitor (say 1uF) to the level where the GPIO recognises a "1" condition (about 2Volt). Starting with a condition where the capacitor is fully discharged (by setting the GPIO to out...
by mahjongg
Fri Mar 27, 2020 3:47 pm
Forum: Troubleshooting
Topic: Brand new RPi smoking
Replies: 2
Views: 118

Re: Brand new RPi smoking

Sounds like the SD-card developed a short inside, and the resulting current flow might have damaged the 3V3 regulator. That sometimes happens it seems. But that is just my well informed guess. Does the sd-card show any damage when you eject it? do you still have 3V3 on the 3V3 GPIO pin? You can use ...
by mahjongg
Fri Mar 27, 2020 3:26 pm
Forum: Off topic discussion
Topic: My new ZX81 clone, built from discrete pin-through hole components
Replies: 39
Views: 9475

Re: My new ZX81 clone, built from discrete pin-through hole components

Thanks all, still a lot to do. Bill of materials, construction manual, user manual, building the prototype and testing it. etc etc, will keep me busy for months to come...
by mahjongg
Fri Mar 27, 2020 3:20 pm
Forum: Troubleshooting
Topic: Pi 4 starts to boot but stops at splash screen.
Replies: 7
Views: 347

Re: Pi 4 starts to boot but stops at splash screen.

If the PI stops while displaying the rainbow screen, that is the moment it switches on the ARM CPU.
It means the ARM code is unrunnable or not present.
and no the RPI is largely immune to slow magnetic fields.
by mahjongg
Fri Mar 27, 2020 1:37 pm
Forum: Troubleshooting
Topic: Raspberry 4B doesn't boot from 32GB sd
Replies: 12
Views: 265

Re: Raspberry 4B doesn't boot from 32GB sd

Try another sd-card programmer, some won't work well with 32GB cards.

a cheap poundland USB programmer will probably do the trick.

Also check if your SD-card isn't a fake, with a program that checks if sd-cards are genuine.
by mahjongg
Fri Mar 27, 2020 1:34 pm
Forum: Troubleshooting
Topic: Not working green led diode on raspberry pi
Replies: 1
Views: 40

Re: Not working green led diode on raspberry pi

Please read the boot problem sticky in trouble shooting.
by mahjongg
Thu Mar 26, 2020 9:02 pm
Forum: General discussion
Topic: Pi B - no WiFi - ever!
Replies: 11
Views: 291

Re: Pi B - no WiFi - ever!

Imperf3kt wrote:
Thu Mar 26, 2020 8:52 pm
mahjongg wrote:
Thu Mar 26, 2020 5:52 pm
Yeah, there is no such thing as a "Pi B", only RPI2B, RPI3B, 3B+ and 4B
which of them do you have???
The product page for the Pi b+ says there is, albeit no longer sold new.

Ita possible the OP bought one of those.
Thats a PI1B+ not just a Pi B
by mahjongg
Thu Mar 26, 2020 6:21 pm
Forum: Beginners
Topic: starting up
Replies: 2
Views: 70

Re: starting up

start reading this: https://www.raspberrypi.org/forums/view ... 28&t=58151, and use a better power supply/cable.
by mahjongg
Thu Mar 26, 2020 5:52 pm
Forum: General discussion
Topic: Pi B - no WiFi - ever!
Replies: 11
Views: 291

Re: Pi B - no WiFi - ever!

Yeah, there is no such thing as a "Pi B", only RPI2B, RPI3B, 3B+ and 4B which of them do you have??? and I asked Raspberry if there was a definite test but received no help at all. where did you ask, if not on this forum??? And no there is no "definitive test"... for one, it depends on which model y...
by mahjongg
Thu Mar 26, 2020 3:22 pm
Forum: Off topic discussion
Topic: My new ZX81 clone, built from discrete pin-through hole components
Replies: 39
Views: 9475

Re: My new ZX81 clone, built from discrete pin-through hole components

The PCB is finished, (done some tiny tweaks and improvements) such as all the default jumper connections are now all on the back where they can be cut and modified if you want to use a real ZX-81 ROM, or switch to 32K RAM (instead of 16K) among other things: https://revspace.nl/images/9/95/Final_ZX8...
by mahjongg
Wed Mar 25, 2020 6:25 pm
Forum: Ubuntu
Topic: Linux Mint "Debbie" on Raspberry Pi
Replies: 2
Views: 121

Re: Linux Mint "Debbie" on Raspberry Pi

Moved to "ubuntu".
by mahjongg
Wed Mar 25, 2020 10:29 am
Forum: Advanced users
Topic: I can't find IC number
Replies: 4
Views: 251

Re: I can't find IC number

If "NA1G0" is an IC identificator then it resembles single gate logic, like the 74HC 1G0 0, but that cannot be as it as they as a minimum should have 4 pins (power ground input, output). It looks more like a transistor, but that is all I can say, RPI's are not open hardware, and only partial schemat...
by mahjongg
Wed Mar 25, 2020 9:51 am
Forum: Beginners
Topic: Is my Raspberry Pi 3 B+ hacked? [NO]
Replies: 3
Views: 242

Re: Is my Raspberry Pi 3 B+ hacked?

zaneytop wrote:
Fri Mar 20, 2020 5:57 pm
Is there accessible memory on the Pi B+(potentially RAM) that he could have loaded some script onto, regardless of the SD card, that would run/install from a fresh Raspbian image?
NO! Absolutely not!
A PI3B+ does NOT have permanent memory, so this is NOT possible.
End of story! :ugeek:
by mahjongg
Mon Mar 23, 2020 1:28 pm
Forum: Beginners
Topic: Microsoft Teams Support
Replies: 19
Views: 884

Re: Microsoft Teams Support

Teams is a closed source application from Microsoft, and it doesn't run on a RPI. Unless Microsoft starts supporting Teams for RPI there is nothing we can do. there are alternatives that are open source, you could try to use, but they won't be compatible with Teams, or Skype for Business. An alterna...
by mahjongg
Mon Mar 23, 2020 12:48 pm
Forum: C/C++
Topic: How to measure time with nanosecond accuracy?
Replies: 19
Views: 607

Re: How to measure time with nanosecond accuracy?

Yes for nanosecond resolution you will almost certainly need external hardware, for example a time of flight (lightspeed) measuring device.
by mahjongg
Mon Mar 23, 2020 12:45 pm
Forum: HATs and other add-ons
Topic: PoE HAT Schematics
Replies: 6
Views: 435

Re: PoE HAT Schematics

Probably not, if its not published in the usual place, then the RPF will probably not release it.
by mahjongg
Sun Mar 22, 2020 1:22 pm
Forum: Raspbian
Topic: Cannot get USB drives to go idle
Replies: 6
Views: 216

Re: Cannot get USB drives to go idle

first rule here is to be nice to each other, and do not expect to be "serviced" all visitors here are equal.

try to get along.....

trouble makers will be banned!!! :roll:
by mahjongg
Sat Mar 21, 2020 1:01 am
Forum: Java
Topic: Ray-cast 3D Game Engine
Replies: 18
Views: 527

Re: Ray-cast 3D Game Engine

added code tags
by mahjongg
Thu Mar 19, 2020 6:23 pm
Forum: Graphics, sound and multimedia
Topic: 100% cpu with cheese webcam
Replies: 2
Views: 210

Re: 100% cpu with cheese webcam

Use the official RPI camera instead of a webcam.

It doesn't suffer from limited bandwidth on the single USB-2 port the RPI3 has, like any USB webcam will suffer, unless the webcam itself does video compression.

also Ubuntu doesn't use the RPI's GPU, unlike Raspbian.
by mahjongg
Thu Mar 19, 2020 1:34 pm
Forum: General discussion
Topic: Eltechs ExaGear Desktop will be discontinued on Feb.28'th 2019
Replies: 29
Views: 19448

Re: Eltechs ExaGear Desktop will be discontinued on Feb.28'th 2019

Please note that links to places where you can download a hacked (keyless) version of ExaGears software counts as illegal spreading of commercial software, so is illegal and NOT allowed here. Links published here will be deleted and the poster banned! As long as Eltechs doesn't declare their softwar...

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