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by FM81
Mon Nov 27, 2017 9:37 am
Forum: Other projects
Topic: 64bit Buildroot operating system and the Pi3
Replies: 2
Views: 199

Re: 64bit Buildroot operating system and the Pi3

Believe me, such things will never work! And if you got them working anyhow, after pulling out your hair, someone will came a few weeks later, changing a few lines or few variables in the hiddenst config you ever can assume (because he think he's important and MUST do that), and you'll have to start...
by FM81
Thu Nov 23, 2017 8:50 pm
Forum: Arch
Topic: Arch Linux 64bit on Raspberry Pi 3
Replies: 8
Views: 2150

Re: Arch Linux 64bit on Raspberry Pi 3

Can you provide a link to a complete image? At the page you've linked there are dozens of links, which isn't helpful for a Gentoo-beginner?
Forgot my post & thanks for providing this! (Just need a little bit scroll down!)

Thank you, FM_81
by FM81
Wed Nov 22, 2017 4:58 pm
Forum: General discussion
Topic: OS w/ web server on 2GB SD card?
Replies: 6
Views: 250

Re: OS w/ web server on 2GB SD card?

Busybox includes a HTTP-server and CGI-scripting. (May be PHP can be added somehow, I've never needed this.) The resulting system should be about 30 or 50 MB in size. (may be among?)

Best Regards, FM_81
by FM81
Sat Nov 18, 2017 1:37 pm
Forum: General discussion
Topic: Secure delete/erase SD using encryption
Replies: 11
Views: 502

Re: Secure delete/erase SD using encryption

All the things said before are correct; I didn't understand the question at all: One, who has such important data on his SD-cards, should also have enough money, to destroy them physically to make sure nothing will get in wrong hands! So there is no need, to make a "headstand" for erasing safe or wh...
by FM81
Sat Nov 18, 2017 7:25 am
Forum: Beginners
Topic: New NTP server questions/problems.
Replies: 9
Views: 415

Re: New NTP server questions/problems.

It's possible, that server 127.127.1.0 # local clock fudge 127.127.1.0 stratum 10 isn't supported by the RPi-RTC? My experiance about this feature came from x86/amd64-machines; here it was working without any problems? May be my assumption about the raspberry-RTC is wrong? EDIT: I've just tested on ...
by FM81
Fri Nov 17, 2017 10:43 am
Forum: Graphics, sound and multimedia
Topic: Improving audio quality
Replies: 4
Views: 351

Re: Improving audio quality

I assume NO! I've never needed such kind of filtering on my projects. But avoid ground-loops where ever you can ...

Greetings, FM_81
by FM81
Tue Nov 14, 2017 6:34 pm
Forum: Graphics, sound and multimedia
Topic: Improving audio quality
Replies: 4
Views: 351

Re: Improving audio quality

If you mean this https://shop.pimoroni.com/products/phat-dac - yes, it has the same chip as the first hifiberry (over years lots of other versions was added) and there should be no significant difference in quality. It simply sounds good. But be aware that it is line-out-level only, means for drivin...
by FM81
Tue Nov 14, 2017 6:20 pm
Forum: Beginners
Topic: Rpi 3 Shutdown button
Replies: 16
Views: 843

Re: Rpi 3 Shutdown button

Because the Pi was never designed to be used in applications which require battery or power management. It is primarily a turn it on and leave it on device intended to be used with a mains powered PSU. This is absolutely correct! But for many people it gives a "special stimulus' to make things that...
by FM81
Tue Nov 14, 2017 6:00 pm
Forum: Beginners
Topic: New NTP server questions/problems.
Replies: 9
Views: 415

Re: New NTP server questions/problems.

How do I tell the NTP that there is an RTC on the computer? You can add something like this to your config: server 127.127.1.0 fudge 127.127.1.0 stratum 15 But I'm not very sure if this is still supported, the "orphan mode" seems to have replaced something in the last months? But you have nothing t...
by FM81
Mon Nov 13, 2017 7:32 pm
Forum: Beginners
Topic: Rpi 3 Shutdown button
Replies: 16
Views: 843

Re: Rpi 3 Shutdown button

Just put a physical switch between the battery and the power input to break the vcc connection after you perform a shutdown. (wait about 10 seconds) OK, one can do it in this way, of course! But it's not much elegant: You always have to do TWO actions at the end. One for shutdown and one for discon...
by FM81
Mon Nov 13, 2017 6:06 am
Forum: Beginners
Topic: Noise isolation via Ferrite Beads
Replies: 6
Views: 298

Re: Noise isolation via Ferrite Beads

I assume you're speaking about analog audio? You seem to have a ground loop: a part of raspberrys supply-current (which is full of noise) is taking the way over your audio-ground lines. There are several ways to solve this: - a ground-loop-isolator (Puts a transformator in the audio way, gives a lit...
by FM81
Sun Nov 12, 2017 3:25 pm
Forum: Beginners
Topic: New NTP server questions/problems.
Replies: 9
Views: 415

Re: New NTP server questions/problems.

Have you told your NTP-server (in it's config) also to use the RTC as source?
Otherwise these two components (NTP and RTC) doesn't know about the existance of each other ...

Greetings, FM_81
by FM81
Sun Nov 12, 2017 11:46 am
Forum: Beginners
Topic: Rpi 3 Shutdown button
Replies: 16
Views: 843

Re: Rpi 3 Shutdown button

So the RPi is out there, performing it's functions (handheld)... Is it running from battery? (explanation why asking this comes later) ... and now it's time to stop. What i would like: There is a switch (tumbler?) that says on/off, it "breaks" the basic python while loop and launches the command "s...
by FM81
Sat Nov 11, 2017 7:48 am
Forum: General discussion
Topic: Remote reset
Replies: 16
Views: 537

Re: Remote reset

Of course, I'm sure my post wouldn't help the thread-opener at all. But in general such a scenario is possible! If you have a remote network-infrastructure which is allowing this , and you have a RPi3 or RPi2v1.2 (ore some person which swaps the SD-cards if it is a RPi2v1.1.). This would give the po...
by FM81
Sat Nov 11, 2017 7:16 am
Forum: Troubleshooting
Topic: No USB boot with ADATA S102 (Raspberry Pi 2)
Replies: 5
Views: 233

Re: No USB boot with ADATA S102 (Raspberry Pi 2)

Following https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/, I thought I would be able to boot USB with only an SD card containing bootcode.bin. This does in fact work! With an old smelly 4gb USB stick.. It means in general you're doing everything right. You could also try a...
by FM81
Tue Oct 31, 2017 8:53 am
Forum: General discussion
Topic: boot off USB drive - easy ways to expand file system?
Replies: 6
Views: 337

Re: boot off USB drive - easy ways to expand file system?

You only need to follow this https://elinux.org/RPi_Resize_Flash_Partitions#Manually_resizing_the_SD_card_on_Raspberry_Pi with a few little changes: - if you have only one block-device connected (which is strongly recommended during this) it is named /dev/sda instead /dev/mmcblk0 - skip this on norm...
by FM81
Tue Oct 31, 2017 8:29 am
Forum: Beginners
Topic: [SOLVED]12v UPS DIY circuit attiny85 lm317
Replies: 66
Views: 9012

Re: 12v UPS DIY circuit attiny85 lm317

The ATtiny 85 has it''s own watchdog. It can be figured to a maximal timeout of 8 seconds; for example to create an interrupt. If you combine this with an additional counter, which reacts only after 38 (8*38=304 which is 5 minutes and 4 seconds) - Could this be a solution? And the pin-change-interru...
by FM81
Mon Oct 30, 2017 4:01 pm
Forum: Beginners
Topic: [SOLVED]12v UPS DIY circuit attiny85 lm317
Replies: 66
Views: 9012

Re: 12v UPS DIY Help

it works without disabling the fuse (i don't have a high voltage programmer and I use the Pi to program the attiny85 :) ) I just maintain to not bring the voltage below 2.5v. my only problem is the interrupts implementation in the attiny85. here is the code. the interrupt section is what i dont und...
by FM81
Mon Oct 30, 2017 6:27 am
Forum: Beginners
Topic: [SOLVED]12v UPS DIY circuit attiny85 lm317
Replies: 66
Views: 9012

Re: 12v UPS DIY Help

Pin 1 will be used to monitor the voltage divider seet to 3v3 for battery monitor. just do not make it below 2.5v or else will reset the attiny85 right? I'm not sure, if this will work; there is also a pull-up-resistor on the RESET-pin? May be, you have to set the RESET-DISABLE-fuse and you must us...
by FM81
Thu Oct 26, 2017 12:58 pm
Forum: Beginners
Topic: [SOLVED]12v UPS DIY circuit attiny85 lm317
Replies: 66
Views: 9012

Re: 12v UPS DIY Help

ATtiny 85 has 5 free IO-Pins, not only 2? You can use these 3 used for programming also for your own needs ...

Best Regards, FM_81
by FM81
Thu Oct 26, 2017 12:45 pm
Forum: Troubleshooting
Topic: PXE boot not working
Replies: 3
Views: 201

Re: PXE boot not working

As far as I know the PXE code in the RPI-3 is solid. No, it isn't! If it works for you, then it's OK. But it means only, you're "on the lucky side", nothing less, nothing more ... :) For all the others, two examples: https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=175228 https://www.raspber...
by FM81
Thu Oct 26, 2017 5:05 am
Forum: Graphics, sound and multimedia
Topic: Best way to set up my raspi as a music hub/server?
Replies: 2
Views: 618

Re: Best way to set up my raspi as a music hub/server?

grayzai11 wrote:
Tue Oct 10, 2017 6:36 pm
The one feature I can't find is that if I have a song on my phone, I'd like to be able to send it to the pi to store, then play it from there.
Only for interest: does 'picoreplayer' include this special feature?

Greetings, FM_81
by FM81
Thu Oct 26, 2017 4:53 am
Forum: Troubleshooting
Topic: PXE boot not working
Replies: 3
Views: 201

Re: PXE boot not working

Try an empty card, with only an (actual) bootcode.bin on it (nothing more, only this file). If network-booting is working in this case, you can do nothing , a few threads are existing about this. (It's angry, but true!) If network-booting is not working in this case, something is wrong in your serve...
by FM81
Thu Oct 26, 2017 4:44 am
Forum: General discussion
Topic: Raspbian with Read-only Root
Replies: 144
Views: 32859

Re: Raspbian with Read-only Root

I think if you ever write anything to the SD card you are defeating the point of making this read-only root system. Even if you make a new partition to write data to. I'm not sure that's right. I'd assume Heater is right? Nobody know's, if wear-leveling on SD-cards, you're typically using on a rasp...
by FM81
Thu Oct 12, 2017 8:50 am
Forum: Deutsch
Topic: Raspberry Unterputz mit Touch
Replies: 6
Views: 3103

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 ...

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