Raspberry Pi Forums

LTolledo

AFAIK stereo sound is determined by ears, not by eyes (or any other human sensory organ)

plug your headphone (or any other audible audio output device) and play the video from the link below
https://www.youtube.com/watch?v=hTvJoYnpeRQ

use your ear to check audio is stereo or not.

LTolledo

its not the RPi4B's fault!
change your router, the one with GbE!
demand one from your provider!

LTolledo

Get one of each.... and welcome to the world of electronics and computer tinkering!

hope your finance manager is reasonable chap.....

LTolledo

what I did was cloned the RPi4B-4GB's working 32GB microSD (Raspbian Buster full desktop) to another 32GB microSD. then popped the newly cloned microSD to my brand new RPi4B-8GB..... it worked flawlessly... accidentally interchanged the microSD during final hardware setup (transferred the RPi4B-4GB'...

LTolledo

ok, now it seems that the ownership is still set to root we need to change ownership of that mount to the user (will be assuming that its " pi ", just change it accordingly) sudo chown -R pi:pi /mnt/A16a you may do the same for the other drive. do change the access rights to /mnt/A16b as well sudo c...

LTolledo

lets see the permissions set for those mounts
post the result of the commands below

Code: Select all

cd /mnt
ls -la

LTolledo

looking at the results of blkid and your entries in fstab the UUIDs does not match. that is why you're getting unfavorable results. one way to fix: UUID=BA064C46064C063B /mnt/A16a auto defaults,noatime,rw,nofail 0 1 UUID=586C664A6C66234C /mnt/A16b auto defaults,noatime,rw,nofail 0 1 edit your /etc/f...

LTolledo

this question is better posted on the ros audio forum (if it does exist) as its clearly a problem with their software, not the RPiOS and/or RPi board.

LTolledo

for the "hiccup"
post the results of blkid again
and post the entire contents of your fstab

lets see where the problem started....

LTolledo

I do find it odd that the relay board having just one transistor is "active high" type, as the usual ones are "active low" types

could be the transistor used for relay coil activation is a PNP type....

LTolledo

Yes you can supply directly to the 5v header pins dont forget to connect the GND also for connecting wires, the usual recommendation is to use AWG20 wire (or 0.75mm sq) and keep the wire length as short as possible to prevent voltage drops. dont use those dupont jumper wires (that usually come as pa...

LTolledo

something similar to this: relay activation test 1.jpg relay activation test2.jpg oops so my post above was a bit late.... for transistor you'll need either 2N3904 (my fave) 2N2222 (pcmanbob's fave) BC547 S8050 S9011 for resistor you'll need 1kohm (color code: brown-black-red-gold) you'll also need ...

LTolledo

A RPi4B-2G is my HDD cluster controller ( a task previously an exclusive task of a I7 w$10 system) buck converter top board v3.0 testing on RPi4B-2G.jpg image above was taken during its power module test. and this is how its desktop looks like after booting with the HDD clusters attached RPi4B-2G-ex...

LTolledo

so can you post some pictures of the board showing it the other way round as it appears to have some components on it. I also suspect the transistor drive circuit is on the "far side" of the relay board as such, connecting the IN to GND will activate the relay's coil (that is if VCC is connected to...

LTolledo

one thing for sure.... those max values are "non-negotiable"

LTolledo

Nowadays....I power my RPi "B" boards from 12v via a DIY power top board. Buck Converters for RPi projects.jpg buck converter top board v3.0 testing on RPi4B-2G.jpg including this RPI4B-4G that am using to post to this forum... the DIY power top board's voltage output is set to 5.1v, prior to attach...

LTolledo

after updating and upgrading last night:

: RPi4-4G OS-release after 06-09-2020 update_upgrade.jpg (66.58 KiB) Viewed 346 times

still sporting the "venerable one"

AFAIKR this unit's OS installation was done last December 2019
is there any way to check the "age" of the installation?

LTolledo

I just tried transferring my monitor connection from HMDI-1 to HDMI-2
I got visuals on HDMI-2, and after setting the audio to output to HDMI-2 I also got audio (played a YT video)

have you tried other HDMI cables? the one you're currently using maybe faulty...

LTolledo

something is not right.... if your keyboard and mouse does not work and cannot SSH to the RPi.... how were you able to do add: max_usb_current = 1 AFAIK, RPi boards has no telekinesis sensors built in (please correct me on this!) just check your wired keyboard again on another PC to verify if its st...

LTolledo

beany wrote: ↑
Tue Jun 09, 2020 11:57 am
...however it is only for one fan and it is rather complicated!

as you want to control 4 PWM fans, then multiply the complexity by 4! (that's 4 factorial).....

LTolledo

CONGRATULATIONS! it was quite long and I do admire your patience. now for some cleanup: most likely you initially made SG16G1 and SG16G2 before finally using A16a and A16b browse the contents of those directories. if there are none and its not used in /etc/fstab then you may delete it. rmdir /mnt/SG...

LTolledo

with pcManFM..... after copying.... I usually press F5...

LTolledo

just to confirm.... I need to do this? sudo rpi-eeprom-update to enable MSD boot? No, you download the beta EEPROM recovery and make a recovery SD card to flash the boot-loader. Then it's recommended to start with a fresh Raspberry Pi OS on SD card and apt update/apt full-upgrade it (but I just did...

LTolledo

is this another

".....the tool user is the problem.... not the tool...." ?

LTolledo

from your smb.conf file: ## Browsing/Identification ### # Change this to the workgroup/NT-domain name your Samba server will part of workgroup = WORKGROUP . . . [share_backup] comment = Backup data path = /mnt/A16a browsable = yes read only = no directory mask = 0775 create mask = 0775 you used the ...

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