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by davidcoton
Sat Nov 27, 2021 9:42 pm
Forum: General discussion
Topic: Raspberry voltage requirement
Replies: 17
Views: 548

Re: Raspberry voltage requirement

I think I will just throw 17/18 gauge wires on it and call it a day. They're cheap. No switches or similar, it's going to be turned on and off with the rest of the stereo. May I ask you to confirm if it's 0.k. to solder power in directly on 'test points' (naked copper patches on the back)? Solderin...
by davidcoton
Sat Nov 27, 2021 6:34 pm
Forum: General discussion
Topic: Raspberry voltage requirement
Replies: 17
Views: 548

Re: Raspberry voltage requirement

The people hearing "better" sound may be confused by the sound of money dropping into their bank account. Short power supply cables with a decent wire gauge (22AWG for a Pi0, 18AWG for the more power thirsty model, lower numbers are thicker and therefore better) should not present any prob...
by davidcoton
Fri Nov 26, 2021 11:08 pm
Forum: Raspberry Pi OS
Topic: Raspbian / Raspi OS updates -- on releases and kernels
Replies: 8
Views: 322

Re: Raspbian / Raspi OS updates -- on releases and kernels

1) Buster is probably now "stuck" (I think at 5.10) and will not get a later kernel. It will probably only get security updates for anything else, they will be what Debian provides -- now (or soon) RPT maintenance of Buster will end. (Two caveats -- things may still happen if they are imp...
by davidcoton
Fri Nov 26, 2021 10:36 pm
Forum: General discussion
Topic: Raspberry voltage requirement
Replies: 17
Views: 548

Re: Raspberry voltage requirement

Sorry if someone else already answered this, but I wanted to give an answer based on my experience with Pis. They won't shutdown as long as it is still enough voltage for what you're running. However I found more demanding tasks use more voltage, thus making the Pi turn off from a lack of power. So...
by davidcoton
Fri Nov 26, 2021 10:25 pm
Forum: General discussion
Topic: Raspberry voltage requirement
Replies: 17
Views: 548

Re: Raspberry voltage requirement

... What are those regulators for? I've seen some reviews where people claim there was a significant upgrade in audio after the replacement of a stock PSU with a linear one. Either way, it's not going to cost much more than a stock power supply anyway. As for the audio, the plan was to connect it t...
by davidcoton
Fri Nov 26, 2021 10:02 pm
Forum: Advanced users
Topic: What would be considered as a good / modest overclock speed?
Replies: 10
Views: 443

Re: What would be considered as a good / modest overclock speed?

The maximum guaranteed operating frequency is the stock frequency. Anything above that is a bonus, and depends on the individual chip.

tl;dr? Suck it and see.
by davidcoton
Fri Nov 26, 2021 9:51 pm
Forum: General discussion
Topic: Raspberry voltage requirement
Replies: 17
Views: 548

Re: Raspberry voltage requirement

Thanks for answering! That's great to hear, voltage should not drop below 4.8 at any point. By the way, when it drops under 4.75, what exactly happens (appart from a notification)? It restarts, shuts down? Do you know how much current pi zero 2w uses with a slight overclock? It is old school, toroi...
by davidcoton
Thu Nov 25, 2021 8:51 pm
Forum: Raspberry Pi OS
Topic: Raspbian / Raspi OS updates -- on releases and kernels
Replies: 8
Views: 322

Re: Raspbian / Raspi OS updates -- on releases and kernels

rpi-update will install pre-release, often testing versions, both of kernels and userland. Do not use it unless you need to solve a particular problem, AND an experienced forum member (preferably an RPT engineer) has recommended it. In particular, do not experiment unless you know how to make a back...
by davidcoton
Wed Nov 24, 2021 1:53 pm
Forum: Troubleshooting
Topic: Did I fry my Pi?
Replies: 5
Views: 196

Re: Did I fry my Pi?

If you are lucky (no guarantees) the TVS diode will have taken the hit and failed short circuit. Which model Pi? All except the Pi0 range have a TVS diode, but the component numbering varies. If you can identify the correct component on your model from the published partial schematics (it's D1 on a...
by davidcoton
Wed Nov 24, 2021 12:39 am
Forum: Troubleshooting
Topic: Did I fry my Pi?
Replies: 5
Views: 196

Re: Did I fry my Pi?

If you are lucky (no guarantees) the TVS diode will have taken the hit and failed short circuit. Which model Pi? All except the Pi0 range have a TVS diode, but the component numbering varies. If you can identify the correct component on your model from the published partial schematics (it's D1 on a ...
by davidcoton
Mon Nov 22, 2021 10:32 am
Forum: General discussion
Topic: Increasing the Minimum Frequency Worth a Try?
Replies: 1
Views: 105

Re: Increasing the Minimum Frequency Worth a Try?

Majority I have seen have decreased their min in order to not draw lots of power during Idle. Would love the community's input. Exactly that. Minimum settings are only used when idle, so no performance gain in increasing them. (There will be a short lag switching from idle speed to the fastest spee...
by davidcoton
Sun Nov 21, 2021 11:10 pm
Forum: Beginners
Topic: Resister Values
Replies: 31
Views: 846

Re: Resister Values

Boyoh: Much as I admire your dedication to getting people to learn electronics, the third circuit in your notes is not safe. Winding the potentiometer to one end of the track will apply 12V directly to the transistor base -- which will result in smoke signals, but no amplification ever after. An ext...
by davidcoton
Sun Nov 21, 2021 10:57 pm
Forum: General discussion
Topic: Hard Reset on pi Zero 2 W
Replies: 8
Views: 319

Re: Hard Reset on pi Zero 2 W

The "Run" pins have never been fitted on any Pi0 model, nor any other AFAICR. You can solder a header on if you need to use it, or solder wires directly into the holes. BUT resetting by that method is just as dangerous (to the contents of the SDCard) as switching "off and on again&quo...
by davidcoton
Fri Nov 19, 2021 8:36 pm
Forum: Raspberry Pi OS
Topic: sudo apt update confusion!
Replies: 7
Views: 421

Re: sudo apt update confusion!

The previous version of RPiOS, Buster, had a 32-bit release and a 64-bit beta. It is the same for the recently released RPiOS Bullseye. So older downloads will be Buster, and very new ones will be Bullseye (unless you went looking for an older version). You will not have the 64-bit beta version unle...
by davidcoton
Tue Nov 16, 2021 9:40 am
Forum: General discussion
Topic: Top reasons to move to Bullseye?
Replies: 41
Views: 1868

Re: Top reasons to move to Bullseye?

Gavinmc42 wrote:
Tue Nov 16, 2021 1:54 am
Until YT works in Chromium, most people should stay with Buster unless they want to help find bugs like this one.
I thought NOT having YT in Bullseye was the top reason to upgrade. :lol:
by davidcoton
Mon Nov 15, 2021 3:42 pm
Forum: Off topic discussion
Topic: rpi4 burned off
Replies: 13
Views: 588

Re: rpi4 burned off

This is an overvoltage protection diode, which shorts the 5V input when there is more than 6 Volt on it. It will only work to keep the rest of the circuitry safe if the larger than six volt comes from a weak source, but in your case the diode has "exploded" and is burned up, after that th...
by davidcoton
Fri Nov 12, 2021 11:16 pm
Forum: Off topic discussion
Topic: Pi4 availability
Replies: 14
Views: 676

Re: Pi4 availability

rpiMike wrote:
Fri Nov 12, 2021 1:14 pm
Maybe try contacting Cool Components?

https://coolcomponents.co.uk/collection ... 5479595069
Cool Components wrote:Please Note: We are currently limiting all Raspberry Pi 4s to 1 per customer
by davidcoton
Fri Nov 12, 2021 11:12 pm
Forum: Beginners
Topic: Missing options in raspi-config
Replies: 2
Views: 193

Re: Missing options in raspi-config

KMS is the default in Bullseye.
See the release blog.
by davidcoton
Thu Nov 11, 2021 5:25 pm
Forum: General discussion
Topic: USB boot on the Pi Zero 2 W?
Replies: 37
Views: 2881

Re: USB boot on the Pi Zero 2 W?

AIUI, you need to boot ONCE from SDCard with program_usb_boot_mode=1 in config.sys, to set up USB booting on Pi2B v1.2 or Pi3 (Not needed on Pi3+ or Pi4, won't help on Pi0 or Pi1). In general, that will configure the Pi to try to boot from USB. I'm not absolutely certain it's necessary on a Pi02. Do...
by davidcoton
Mon Nov 08, 2021 5:18 pm
Forum: Troubleshooting
Topic: No bluetooth on Bullseye
Replies: 9
Views: 469

Re: No bluetooth on Bullseye

A Bullseye build has been made available today. Try that.
by davidcoton
Mon Nov 08, 2021 11:45 am
Forum: Raspberry Pi OS
Topic: 64-bit raspios for 3b
Replies: 7
Views: 507

Re: 64-bit raspios for 3b

You've probably noticed by now, there's a new beat of the 64-bit OS, based on Bullseye, released today.
:o
by davidcoton
Mon Nov 08, 2021 10:56 am
Forum: General discussion
Topic: The Raspberry Pi Zero 2 W Thread
Replies: 378
Views: 18992

Re: The Raspberry Pi Zero 2 W Thread

"2021-10-30:
* Based on Debian version 11 (bullseye)"
by davidcoton
Mon Nov 08, 2021 9:45 am
Forum: Troubleshooting
Topic: [Solved]How to increase WiFi range?
Replies: 7
Views: 374

Re: How to increase WiFi range?

Any improvements you make to antennas will improve the signal in both directions. OTOH, improvements to transmitter power or receiver gain are unidirectional. WiFi needs working signals in both directions before you can transfer data. I don't think there is a broadcast mode that would send data with...
by davidcoton
Sun Nov 07, 2021 10:25 pm
Forum: Troubleshooting
Topic: [Solved]How to increase WiFi range?
Replies: 7
Views: 374

Re: How to increase WiFi range?

I have several solutions for such problem. 1. Attach a WiFi router on the rover and have Raspberry Pi and my phone connect to the router. 2. Desolder the onboard wifi antenna and solder another with better range. Your solution (2) would breach the product certification, which could go badly for you...
by davidcoton
Thu Oct 28, 2021 9:23 pm
Forum: General discussion
Topic: Raspi not booting up
Replies: 6
Views: 212

Re: Raspi not booting up

What is the file path of those pictures? For the sake of this post, I'm going to assume it's /home/pi/pictures. Take the SD card out of the Pi and insert it into a separate (working) computer (probably via a USB SD card reader). Then use File Browser or Finder (depending on your OS) to locate the r...

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