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by mahjongg
Mon Jan 21, 2019 1:38 pm
Forum: Beginners
Topic: VPN
Replies: 20
Views: 3931

Re: VPN

Locking as this thread is turning into a VPN advertisement site for commercial VPN services.
by mahjongg
Sun Jan 20, 2019 3:52 pm
Forum: General discussion
Topic: computer power supply
Replies: 25
Views: 719

Re: computer power supply

Note that fuses have resistance (otherwise they would not be able to heat up, and burn through). Make sure you use one that does not impair the voltage the PI receives, or it will do exactly the same as a "bad USB cable with wires that are too thin", and becomes a problem all in itself. The fuse sho...
by mahjongg
Sat Jan 19, 2019 1:56 pm
Forum: General discussion
Topic: new to soldering - safety questions, etc.
Replies: 46
Views: 889

Re: new to soldering - safety questions, etc.

I don't see anything there. Only SPAM for ufile or whatever stupid app/service. Agreed, So I treated it as spam, and deleted the offending URL's, and warned the poster, but left the video-link intact.. the soldering video showed only that the person who made it didn't realise that doing this is imp...
by mahjongg
Sat Jan 19, 2019 1:50 pm
Forum: General discussion
Topic: new to soldering - safety questions, etc.
Replies: 46
Views: 889

Re: new to soldering - safety questions, etc.

From the first half minute or so of that video, I get the impression that the manufacturer wasn't at fault, it was the bloke himself. I mean, how can Weller be responsible for his accent? If he had an American accent, there'd have been no problem, would there? Or at least if he moved to America, wh...
by mahjongg
Fri Jan 18, 2019 6:28 pm
Forum: General discussion
Topic: new to soldering - safety questions, etc.
Replies: 46
Views: 889

Re: new to soldering - safety questions, etc.

The first soldering iron I used belonged to my dad. He insisted on filing the tip down. Filing the tip is an absolute NO_NO for modern soldering irons. I can imagine that in the past you did that with the very cheapest old irons which just had a solid copper point, but modern soldering points are p...
by mahjongg
Fri Jan 18, 2019 1:17 pm
Forum: General discussion
Topic: new to soldering - safety questions, etc.
Replies: 46
Views: 889

Re: new to soldering - safety questions, etc.

mahjongg, That made me chuckle: 1) ...de-solder pump should not be used with fragile instruments.. 2) ...Military equipment is never de-soldered with a solder pump. Conclusion: Military equipment is fragile! :) wrong conclusion. The real reason is that military equipment needs special care, because...
by mahjongg
Fri Jan 18, 2019 12:22 pm
Forum: General discussion
Topic: new to soldering - safety questions, etc.
Replies: 46
Views: 889

Re: new to soldering - safety questions, etc.

To test a de-solder pump, close off the tip with your thumb, and press the trigger button. If the pump is good the spring will be released slowly, if there is a leak it will release just as quick as when you do not close off the tip. You have to clean the solder from the inside regularly, and make s...
by mahjongg
Thu Jan 17, 2019 4:18 pm
Forum: General discussion
Topic: New SystemD Vulnerabilities
Replies: 14
Views: 1015

Re: New SystemD Vulnerabilities

SystemD haters will hate, locking.... :geek:
by mahjongg
Wed Jan 16, 2019 10:02 am
Forum: General discussion
Topic: Would a Pi Zero be compatible with this tutorial?
Replies: 9
Views: 277

Re: Would a Pi Zero be compatible with this tutorial?

Its just the ACT LED, without is normally inverted nature.
by mahjongg
Wed Jan 16, 2019 9:56 am
Forum: General discussion
Topic: How can I connect 6 usb cameras to a raspberry pi 3 B+ and open them simultaneously?
Replies: 1
Views: 114

Re: How can I connect 6 usb cameras to a raspberry pi 3 B+ and open them simultaneously?

That is normal expected behavior. All USB transactions will go over the single USB channel the PI has, with a limited throughput. expecting you can put the combined throughput of six camera's through a PI is just wishful thinking. and no I have no idea how to stop camera's from using bandwidth, it d...
by mahjongg
Tue Jan 15, 2019 6:53 pm
Forum: General discussion
Topic: Need help on measuring a set of batteries
Replies: 10
Views: 881

Re: Need help on measuring a set of batteries

First, why do you want to measure the voltage of the batteries, if it is to estimate the remaining capacity of the batteries, then forget about it. With modern batteries (lithium ion) this method, that could be used with nickel-cadmium, is now unusable, as the voltage of a lithium-ion battery, does...
by mahjongg
Tue Jan 15, 2019 6:40 pm
Forum: General discussion
Topic: Pi 3b+ lost Capacitor on PCB
Replies: 16
Views: 879

Re: Pi 3b+ lost Capacitor on PCB

Only the designer knows.
There are no component references on the board, and there is no schematic, the PI is NOT "open source hardware".
an educated guess is that these are decoupling caps, 100nF 6V3 0402, but as I said I'm guessing.
Were the capacitors rubbed off, or never mounted?
by mahjongg
Tue Jan 15, 2019 12:58 pm
Forum: General discussion
Topic: Raspberry Pi and RS-485
Replies: 3
Views: 468

Re: Raspberry Pi and RS-485

RS-485 is a balanced serial signal, with point to multi-point capabilities. The bus master should determine the direction of the transfers. A PI can be a master using the USART for the serial I/O and a GPIO for bus direction. https://en.wikipedia.org/wiki/RS-485 there is no system that "calculates" ...
by mahjongg
Tue Jan 15, 2019 12:53 pm
Forum: Troubleshooting
Topic: By moving a window, it is dragged to the screen
Replies: 9
Views: 837

Re: By moving a window, it is dragged to the screen

Must be a bug in the teamviewer client running on the RPI, a bug not present on the other clients.
by mahjongg
Mon Jan 14, 2019 11:55 pm
Forum: Beginners
Topic: GPIO
Replies: 2
Views: 122

Re: GPIO

None are, they are all digital only (its a computer, not a micro-controller like an Arduino). However it has many digital interface's like I2C, that can be used to attach an external dedicates for the job chip, and Analog To Digital Converter, of varying quality and price depending on your actual ne...
by mahjongg
Mon Jan 14, 2019 11:51 pm
Forum: General discussion
Topic: Need help on measuring a set of batteries
Replies: 10
Views: 881

Re: Need help on measuring a set of batteries

First, why do you want to measure the voltage of the batteries, if it is to estimate the remaining capacity of the batteries, then forget about it. With modern batteries (lithium ion) this method, that could be used with nickel-cadmium, is now unusable, as the voltage of a lithium-ion battery, does ...
by mahjongg
Mon Jan 14, 2019 11:16 pm
Forum: Python
Topic: pigpio error: "no permission to update GPIO"
Replies: 4
Views: 505

Re: pigpio error: "no permission to update GPIO"

added code tags, but left the typo intact.
by mahjongg
Mon Jan 14, 2019 3:32 pm
Forum: Gaming
Topic: Is there a PS1 emulator that comes as an app?
Replies: 6
Views: 460

Re: Is there a PS1 emulator that comes as an app?

and retropie is an os. Are th....
Retropie is NOT an OS, but an application running under Raspbian.
by mahjongg
Mon Jan 14, 2019 3:30 pm
Forum: Gaming
Topic: How to turn your pi into an NES and still use it as a computer
Replies: 4
Views: 457

Re: How to turn your pi into an NES and still use it as a computer

What the difference with retropie, which is ALSO an app running on top of Raspbian.
by mahjongg
Mon Jan 14, 2019 12:23 pm
Forum: Troubleshooting
Topic: Rediclious debug from libusb
Replies: 6
Views: 764

Re: Rediclious debug from libusb

Will delete this necro, as soon as a new thread is created.
by mahjongg
Mon Jan 14, 2019 12:41 am
Forum: Deutsch
Topic: hdmi kein bild
Replies: 38
Views: 872

Re: hdmi kein bild

bitte lese die "boot problem sticky". wenn du kein englisch lesen kann, benutze google translate.

Wenn du Etcher benutzt und damit Raspbian auf die karte schreibst sollte das ding booten, aus das gelbe/grune LED sollte dabei blinken.
wenn raspbian booted sollte HDMI eigentlich automatisch arbeiten.
by mahjongg
Mon Jan 14, 2019 12:34 am
Forum: General discussion
Topic: Operation (on and off)
Replies: 3
Views: 148

Re: Operation (on and off)

No, just unplugging might corrupt the filing system. you should do a shutdown, from the GUI, or give the command shutdown -h now Also, after the shutdown has completed wait another couple of seconds so the controller in the sd-card can finish his last task, before removing the power. if there is now...
by mahjongg
Sun Jan 13, 2019 12:01 pm
Forum: Beginners
Topic: Pi not displaying on CRT tv help! not a cabling error I'm using the cable with two yellow RCA's for my older PI
Replies: 1
Views: 152

Re: Pi not displaying on CRT tv help! not a cabling error I'm using the cable with two yellow RCA's for my older PI

If you are using NOOBS, then you need to press the 3 or 4 key to switch to NTSC or PAL video, while being in NOOBS (repeatedly press shift while booting to re-enter NOOBS, then press 2 or 3 until you get a picture). read more in the boot problem sticky. If you have imaged the sd-card with etcher (im...
by mahjongg
Sat Jan 12, 2019 7:31 pm
Forum: Beginners
Topic: I cannot drag a file to any of the folders in a Samba share from my Mac
Replies: 7
Views: 219

Re: I cannot drag a file to any of the folders in a Samba share from my Mac

Modified the subject line, as best as I can from what i understand the question might be.

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