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by dustnbone
Sat Apr 25, 2020 10:01 am
Forum: General discussion
Topic: Pi setup using phone only
Replies: 5
Views: 442

Re: Pi setup using phone only

Yes very much possible to do with SSH, and VNC as well if you wanted. I've set up Pis with only my phone (that has a MicroSD slot), using it to download and write the image to the SD card, add the ssh file to the boot partition and add the wifi info for the phones hotspot. Setup Wifi Hotspot on Andr...
by dustnbone
Fri Apr 24, 2020 1:43 am
Forum: Teaching and learning resources
Topic: how to destroy your pi.....remove Python!
Replies: 21
Views: 2513

Re: how to destroy your pi.....

I'd imagine Debian (on which Raspbian is based) uses a number of python scripts at boot time, to do various things. It makes sense because Python works very well at doing various things. I still don't get why it's a particularly bad thing, a Linux distribution is by definition a collection of softwa...
by dustnbone
Thu Apr 23, 2020 8:55 pm
Forum: Teaching and learning resources
Topic: how to destroy your pi.....remove Python!
Replies: 21
Views: 2513

Re: how to destroy your pi.....

Why would you remove Python from a modern Linux distro?

Even if it did boot good luck getting anything done with it.
by dustnbone
Thu Apr 02, 2020 6:59 am
Forum: General discussion
Topic: largest Bootable sd card?
Replies: 10
Views: 736

Re: largest Bootable sd card?

I've actually found this to be a great use for old SATA SSDs that have been replaced with bigger faster shinier ones in gaming PCs/laptops.

They're available really cheap in 128GB and 256GB sizes if you look around.
by dustnbone
Wed Apr 01, 2020 11:30 pm
Forum: Raspberry Pi OS
Topic: Just for fun.
Replies: 12
Views: 837

Re: Just for fun.

I'm pretty sure QEMU would let me emulate as many CPU cores/RAM as I asked it to. Or at least 64.
by dustnbone
Wed Apr 01, 2020 11:28 pm
Forum: Troubleshooting
Topic: Pi4 USB Power
Replies: 2
Views: 136

Re: Pi4 USB Power

It's possible the USB power banks output voltage is dropping too low under load, it might be OK initially but as the batteries drain it's not able to cope with the load while maintaining output voltage. Do you know how much current the modems are drawing while in use? If you add those up how close a...
by dustnbone
Wed Apr 01, 2020 6:20 pm
Forum: Beginners
Topic: unable to get any OS on my new RaspberryPi 4B
Replies: 7
Views: 302

Re: unable to get any OS on my new RaspberryPi 4B

I tend to stick to the bigger names when it comes to memory cards. Kingston, Sandisk, Patriot, Samsung, etc.

I haven't tried an off brand uSD in many years, maybe they're not so bad now but back in the day they were a nightmare.
by dustnbone
Wed Apr 01, 2020 6:17 pm
Forum: Troubleshooting
Topic: 2 out of 3 of RPI 4 not booting
Replies: 17
Views: 792

Re: 2 out of 3 of RPI 4 not booting

Have we confirmed there's nothing in the first boot procedure that would make a card setup on a Pi3 not boot on a Pi4 or vice versa?

I've heard enough similar reports from people to wonder is all.

If I was OP I'd try a freshly written Raspbian card to make sure this isn't the case.
by dustnbone
Wed Apr 01, 2020 6:14 pm
Forum: Beginners
Topic: Using Audio DAC HAT
Replies: 6
Views: 257

Re: Using Audio DAC HAT

About 2/3 of the way down the page https://www.raspiaudio.com/home

Instructions for downloading and running a script which should configure the HAT as default output device.

That isn't an input device, only output.
by dustnbone
Wed Apr 01, 2020 6:09 pm
Forum: General discussion
Topic: largest Bootable sd card?
Replies: 10
Views: 736

Re: largest Bootable sd card?

If you're just booting Raspbian there's no practical limit aside from the 2TB limit of SDXC. If you're using NOOBS you just need to use a utility other than the one built into Windows to format it FAT32 because Windows will default to ExFAT on larger cards. I don't recommend this though, because FAT...
by dustnbone
Wed Apr 01, 2020 6:02 pm
Forum: Troubleshooting
Topic: fstab and more than one USB HDD
Replies: 2
Views: 130

Re: fstab and more than one USB HDD

Yep, insufficient power checks out. When you do the (successful) manual mount it's happening when the other drive is probably idle, and not pulling much power. The fstab entries are mounted concurrently, not sequentially, therefore both drives will be highly active (and pulling power to match), caus...
by dustnbone
Wed Apr 01, 2020 3:33 pm
Forum: General discussion
Topic: Rasbian mpv player
Replies: 13
Views: 1479

Re: Rasbian mpv player

Slighty off topic but ihave found mplayer very useful to as a tv viewer. I recently bought a very cheap easycap uvc video capture card (~15cdn dollars) off Amazon. . I connected it to the composite outputs of the settop box from my cable tv provider so that I can watch all available tv channels in ...
by dustnbone
Wed Apr 01, 2020 1:14 am
Forum: Beginners
Topic: What Raspberry Pi Should I Get for {link}?
Replies: 8
Views: 401

Re: What Raspberry Pi Should I Get for {link}?

The photo of the rear shows mounting holes for both Zero and full size Pi boards. It's not a fully enclosed case so A/B/B+ shouldn't matter.
by dustnbone
Wed Apr 01, 2020 1:02 am
Forum: Beginners
Topic: What Raspberry Pi Should I Get for {link}?
Replies: 8
Views: 401

Re: What Raspberry Pi Should I Get for {link}?

It's HDMI. All Pis have HDMI outputs of some kind.
by dustnbone
Tue Mar 31, 2020 8:49 pm
Forum: General discussion
Topic: Rasbian mpv player
Replies: 13
Views: 1479

Re: Rasbian mpv player

I used mpvplayer before because VLC was being an idiot about outputting audio to my USB DAC. For playing back old XVid .avi files it seemed fine, no performance issues to speak of.
by dustnbone
Tue Mar 31, 2020 7:37 pm
Forum: Beginners
Topic: Is it broken or is it me?
Replies: 11
Views: 686

Re: Is it broken or is it me?

ruawolfy1 wrote:
Tue Mar 31, 2020 7:23 pm
There were a lot of failed verifications so they were rewritten until they passed to be used for testing boots.
This is troubling. A failed verification indicates a hardware problem. You shouldn't have different results from identical inputs.

Something is broken here and it isn't the Pi.
by dustnbone
Thu Mar 26, 2020 7:48 pm
Forum: Beginners
Topic: Cooling fan
Replies: 15
Views: 891

Re: Cooling fan

It's never going to get that hot.

The SoC throttles at 80C, it will not get much hotter than that, and therefore neither will anything else attached to it.
by dustnbone
Thu Mar 26, 2020 7:43 pm
Forum: General discussion
Topic: RPi4 video performance
Replies: 66
Views: 8462

Re: RPi4 video performance

The good performance of LibreELEC on the Pi4 isn't a random happening either.

It took some work by a team of people with that specific goal to make it happen.
by dustnbone
Mon Mar 23, 2020 1:02 am
Forum: General discussion
Topic: What is the recommended screen size and resolution for software development using Pi3B+ or Pi 4?
Replies: 4
Views: 378

Re: What is the recommended screen size and resolution for software development using Pi3B+ or Pi 4?

I'd say it really depends on the application you're developing and it's intended use case. 1080p is probably the most common display resolution used with Pis in general, but there are significant numbers running much lower than that. The official display for example is 800x480, and there are quite a...
by dustnbone
Sun Mar 22, 2020 3:52 am
Forum: General discussion
Topic: RPi4 video performance
Replies: 66
Views: 8462

Re: RPi4 video performance

Also recommend LibreELEC, it works really well on the Pi4. HEVC and H.264 at 1080p never exhibit any frame drops, UI is very snappy. Maybe once every 2 months I try to play something it doesn't like and Kodi coughs a hairball and restarts itself. Aside from that no complaints. I don't have a 4K disp...
by dustnbone
Sat Mar 21, 2020 5:23 pm
Forum: General discussion
Topic: raspberry pi 4 play music on 3.5mm and bluetooth
Replies: 5
Views: 327

Re: raspberry pi 4 play music on 3.5mm and bluetooth

Pulseaudio has this capability, and is included with latest Raspbian afaik. A little explanation here: https://www.maketecheasier.com/play-sound-through-multiple-devices-linux/ The tricky thing with one of the output devices being bluetooth is latency. There will be additional delay on the Bluetooth...
by dustnbone
Fri Mar 20, 2020 6:14 pm
Forum: Raspberry Pi OS
Topic: WHY is ssh disabled by default..?
Replies: 20
Views: 1700

Re: WHY is ssh disabled by default..?

A smartphone or tablet with a uSD slot will also work.
by dustnbone
Wed Mar 18, 2020 2:15 am
Forum: Troubleshooting
Topic: Rpi 4 dead, trying to avoid repeat. (1st timer)
Replies: 10
Views: 1003

Re: Rpi 4 dead, trying to avoid repeat. (1st timer)

Also make sure you're tying your grounds together, the Pis ground should be connected to the ground on the ATX supply, and the ground on the buck converters.
by dustnbone
Tue Mar 17, 2020 3:50 am
Forum: Graphics, sound and multimedia
Topic: How to Power it all?
Replies: 9
Views: 1087

Re: How to Power it all?

You could connect the 2 MeanWells in parallel and see if that's enough juice, it sounds like it's shutting off on high current.

The MeanWells are fine being connected in parallel.
by dustnbone
Tue Mar 17, 2020 3:37 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to connect MCP4725 DAC to the speaker?
Replies: 5
Views: 539

Re: How to connect MCP4725 DAC to the speaker?

The output of the DAC will need to be fed to some kind of op-amp and possibly further amplification after that to drive a speaker. Opamp itself might be able to drive an efficient set of headphones on it's own.

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