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by FM81
Thu Oct 12, 2017 8:50 am
Forum: Deutsch
Topic: Raspberry Unterputz mit Touch
Replies: 6
Views: 2618

Re: Raspberry Unterputz mit Touch

Mittlerweile gibt es doch das RPi-Zero-Modell, sogar mit WLAN wenn Du willst! Und passende Audio-D-Class-Verstärker auch: https://shop.pimoroni.com/products/adafruit-i2s-3w-stereo-speaker-bonnet-for-raspberry-pi-mini-kit (Das ist nur ein Beispiel, es dürfte nicht der einzige sein.) Das passt bequem ...
by FM81
Sat Oct 07, 2017 7:22 am
Forum: Media centres
Topic: party jukebox
Replies: 3
Views: 1039

Re: party jukebox

Good morning! May be, the answer can be again mpd ? It runs as server-application on an RPi (also on a model 1) and allows different permissions. (For example only "add" on a special password and "control" for another.) If you already have an network, you need nothing more, many client-applications ...
by FM81
Fri Oct 06, 2017 2:41 pm
Forum: Raspbian
Topic: PowerOff Script execution at shutdown not working
Replies: 17
Views: 3622

Re: PowerOff Script execution at shutdown not working

"In addition to displaying this kernel panic message, the processor heats up considerably." Holy Cow, does it ever... the moment the shutdown occurred the CPU rapidly heated to the point where I could no longer hold my finger on it. This can't be right. I agree, that this can't be right! But nobody...
by FM81
Thu Oct 05, 2017 8:54 am
Forum: Other projects
Topic: How-To Create a GPIO Halt Signal
Replies: 22
Views: 5364

Re: How-To Create a GPIO Halt Signal

Apologies, FM_81, I didn't see your reply until now. In case this is still of any interest to you: The text I posted was the README entry for the now-standard gpio-poweroff overlay. It is present in all current firmware and Raspbian images. I believe that using this overlay you will be able to repl...
by FM81
Sat May 06, 2017 8:07 am
Forum: General discussion
Topic: Command to run at startup after network has started
Replies: 6
Views: 417

Re: Command to run at startup after network has started

ntpd-option '-g' should help in this case: -g Normally, ntpd exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once. If the thresh‐ old is...
by FM81
Fri Apr 21, 2017 12:36 pm
Forum: General discussion
Topic: Need help with headless car radio idea
Replies: 9
Views: 706

Re: Need help with headless car radio idea

According to this https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=140088 a raspberry in shutdown pulls 65mA - I have not verified this in the last months, but let's assume it is correct. Let's also assume, you car-battery may be a 84Ah-type. And let's assume, there would be no loss in voltag...
by FM81
Fri Apr 21, 2017 11:05 am
Forum: General discussion
Topic: Need help with headless car radio idea
Replies: 9
Views: 706

Re: Need help with headless car radio idea

... modern cars have standby systems for remote control and alarms etc anyway and so have batteries specified to cope. My car has one of the batteries that are designed for cars with stop start and I constantly leave stuff plugged in like the 12V adapter with and LED constantly on, dashcam etc and ...
by FM81
Fri Apr 21, 2017 10:56 am
Forum: Graphics, sound and multimedia
Topic: I2S DAC, alsamixer: device does not have any controls
Replies: 4
Views: 700

Re: I2S DAC, alsamixer: device does not have any controls

See example 2 from the link above: pcm.softvol { type softvol slave { pcm "plughw" } control { name "SoftMaster" card 0 } } pcm.!default { type plug slave.pcm "softvol" } This gives you a software-volume regulation with the name "SoftMaster", but auf course you can also use every name you want, also...
by FM81
Fri Apr 21, 2017 5:33 am
Forum: General discussion
Topic: Need help with headless car radio idea
Replies: 9
Views: 706

Re: Need help with headless car radio idea

Don't forget, even if a raspberry is in shutdown-state, it may drain a few mA of current. Means, if not in use for a longer period, it may discharge your car-battery ... That's why it seems better, to build a circuit, which performs a "full disconnect" from the power-line. Especially, when additiona...
by FM81
Fri Apr 21, 2017 5:26 am
Forum: Graphics, sound and multimedia
Topic: I2S DAC, alsamixer: device does not have any controls
Replies: 4
Views: 700

Re: I2S DAC, alsamixer: device does not have any controls

You have to add a software-volume-regulation!
See here: viewtopic.php?p=1128700#p1128700 (the theme of this thread was a little bit different, but it should be declared)

Best regards, FM_81
by FM81
Sun Apr 16, 2017 4:13 pm
Forum: Troubleshooting
Topic: kernel panic : not syncing error at boot
Replies: 4
Views: 317

Re: kernel panic : not syncing error at boot

As this appears on your very first boot there are several possibilitys (all with a "may be"): - your card is a fake and hasn't really the size of what the sticker says - your downloaded image is corrupt (there's a checksum provided, for verifying this) - your powersupply is weak - or some of these t...
by FM81
Sun Apr 16, 2017 4:04 pm
Forum: Advanced users
Topic: Set up ALSA to use dmix and softvol
Replies: 2
Views: 1082

Re: Set up ALSA to use dmix and softvol

Thank you for providing this, it has solved my question in another part of the forum: viewtopic.php?p=1128700#p1128700

Best regards, FM_81
by FM81
Sun Apr 16, 2017 4:03 pm
Forum: Graphics, sound and multimedia
Topic: Merge two 'asound.conf' into one?
Replies: 3
Views: 601

Re: Merge two 'asound.conf' into one?

This has solved the problem for me: viewtopic.php?p=1147994#p1147994

Thanks, FM_81
by FM81
Thu Mar 30, 2017 4:50 am
Forum: General discussion
Topic: Pi Zero W ( Schematics / I2S)
Replies: 2
Views: 1910

Re: Pi Zero W ( Schematics / I2S)

mrblue1234 wrote:1.) Does the Pi Zero W support I2S audio output?
Yes!
Pin 12 = BITCLOCK
Pin 35 = LRCLOCK
Pin 40 = DATA OUT
Of course additional GND is needed, and VCC too.
Also don't forget to load the corresponding overlay and/or kernel-modules.

Greetings, FM_81
by FM81
Wed Mar 29, 2017 3:28 pm
Forum: Raspbian
Topic: Image Raspbian.img and Advanced Format
Replies: 1
Views: 190

Re: Image Raspbian.img and Advanced Format

I have question about Long Data Sector in SD and why, why, why second partition in *-raspbian-*.img begin on мiddle physical sector 4Mbytes I assume, there is some kind of "automatic", when an raspbian-image is build? And that automatism seems not to care about such specials ... 131072 is the best,...
by FM81
Wed Mar 29, 2017 1:14 pm
Forum: Advanced users
Topic: HOWTO: create an SD image to use as a master?
Replies: 10
Views: 905

Re: HOWTO: create an SD image to use as a master?

Make a copy: root@pc:~# cp /home/user/Work/2017-03-02-raspbian-jessie.img /home/remaster/RPi/ Create a dummy of 1GB: root@pc:~# dd if=/dev/zero of=/tmp/null bs=1M count=1024 Append the dummy: root@pc:~# cat /tmp/null >> /home/remaster/RPi/2017-03-02-raspbian-jessie.img Verify new size: root@pc:~# ls...
by FM81
Wed Mar 29, 2017 11:40 am
Forum: Advanced users
Topic: HOWTO: create an SD image to use as a master?
Replies: 10
Views: 905

Re: HOWTO: create an SD image to use as a master?

On the latest Raspbian (and we can assume the TO want's to use the GUI-version, because he plans to install 'gimp') is not much space for any installations, if no expansion is done first! Tested few minutes ago: root@pc:~# mount -o loop,offset=70254592 /home/user/Work/2017-03-02-raspbian-jessie.img ...
by FM81
Sun Mar 12, 2017 8:37 pm
Forum: Graphics, sound and multimedia
Topic: I want to make my Pi into my car Stereo?
Replies: 2
Views: 452

Re: I want to make my Pi into my car Stereo?

My last question is how to turn it off. Raspberry Pi 3 is a computer of its own. When i turn the car off, the power to the board would cease to exist, therefore force shutting the pi down. I'm sure that after so many force shuts, the pi will go KABLOOOOOOO! (figuratively). How do i go about allowin...
by FM81
Sun Mar 12, 2017 8:53 am
Forum: Deutsch
Topic: Roboter-Auto-Motoren mit PWM ansteuern
Replies: 13
Views: 1259

Re: Roboter-Auto-Motoren mit PWM ansteuern

Wie weit sinkt die Batteriespannung ab, wenn die Räder den Boden berühren bzw. Du den Finger drauf legst?
Hat der Step-Down-Regler dann überhaupt noch etwas, was er ausregeln kann?
Ohne die genauen Stromaufnahme-Werte zu kennen, würde ich schätzen/raten "Batterie zu schwach" ...

MfG, FM_81
by FM81
Sat Mar 11, 2017 4:16 pm
Forum: Graphics, sound and multimedia
Topic: Merge two 'asound.conf' into one?
Replies: 3
Views: 601

Merge two 'asound.conf' into one?

Hi at all! Using a raspberry zero together with the "Adafruit Stereo Bonnet 3W". By default is following '/etc/asound.conf' recommended (variant 1): pcm.!default { type hw card 0 } ctl.!default { type hw card 0 } Works, but gives an annoying "PLOP" during start and/or stop. Can be avoided by using t...
by FM81
Sat Mar 11, 2017 12:39 pm
Forum: Graphics, sound and multimedia
Topic: Streaming Music on Pi Zero
Replies: 1
Views: 410

Re: Streaming Music on Pi Zero

Hankar wrote:What do you guy's use?
I use

Code: Select all

mpg123
But there are also

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omxplayer

Code: Select all

mpg321

Code: Select all

mocp

Code: Select all

cvlc
and a lot of other candidates ...

Best Regards, FM_81
by FM81
Sat Mar 11, 2017 12:17 pm
Forum: Advanced users
Topic: rsync not working?
Replies: 5
Views: 568

Re: rsync not working?

What about, if the harddisk isn't really mounted to

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/media/pi/device/
but somewhere else instead? Was this verified?

Greetings, FM_81
by FM81
Fri Mar 10, 2017 12:38 pm
Forum: Advanced users
Topic: PWM Audio Filter + Amp Stereo
Replies: 6
Views: 949

Re: PWM Audio Filter + Amp Stereo

I don't know, what you expect in quality, but for my opinion there are to many conversions: Raspi digital => to analog with PWM on GPIO => to digital into the 8403 => output digital => conversion back to analog As you have no volume-regulator in your circuit, I assume you plan to do this by software...
by FM81
Fri Mar 10, 2017 10:16 am
Forum: Troubleshooting
Topic: I2S dac don't work in Raspberry Pi 3
Replies: 2
Views: 544

Re: I2S dac don't work in Raspberry Pi 3

Did you enable/insert the corresponding overlay in '/boot/config.txt' first?

Greetings, FM_81
by FM81
Fri Mar 10, 2017 9:48 am
Forum: Beginners
Topic: GPU memory "split" question/s
Replies: 13
Views: 2501

Re: GPU memory "split" question/s

People are suggesting all these "programs" which mean I have to download their image and burn it to the SD card. Not that I mind, but it is a lot of messing about, and if I don't like it, it was a severe waste of time. The avantage of all these images is, to get a working system in a short time ......

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