Go to advanced search

by Joel_Mckay
Fri Oct 05, 2018 1:01 am
Forum: Troubleshooting
Topic: SOLVED - Pi3B Rev1.2 - Boot Problems with Stretch
Replies: 25
Views: 4471

Re: Pi3B Rev1.2 - Boot Problems with Stretch

@butchkemper In some cases, if your HDMI screen/TV is off while booting than it may not be detected, shows a black screen, and hides error messages. In your case, I think Imperf3kt may be suggesting you should look at the https://etcher.io/ image installation method, and try a different sdcard. Some...
by Joel_Mckay
Wed Oct 03, 2018 12:44 am
Forum: Troubleshooting
Topic: No HDMI Output Although TV is recognized by RPi 3 B+
Replies: 22
Views: 4992

Re: No HDMI Output Although TV is recognized by RPi 3 B+

Unfortunately, over-voltage on the 3.3 logic chips is fairly bad, but there is a remote chance it tripped the regulator safety. i.e. unplug the power-adapter and cables, give it 60 seconds for the safety circuits or poly-fuse to reset, and power back up without the current sdcard (these usually fail...
by Joel_Mckay
Mon Oct 01, 2018 10:55 pm
Forum: Troubleshooting
Topic: No HDMI Output Although TV is recognized by RPi 3 B+
Replies: 22
Views: 4992

Re: No HDMI Output Although TV is recognized by RPi 3 B+

No, the cable modem uses an Europlug too, which is not grounded. I suppose (without knowing for sure) that the coax is grounded somewhere in the splitter outside the building. I am assuming you already tried a different / newer HDMI cable and signal source to confirm the first HDMI socket is dead. ...
by Joel_Mckay
Sun Sep 30, 2018 10:10 pm
Forum: Troubleshooting
Topic: No HDMI Output Although TV is recognized by RPi 3 B+
Replies: 22
Views: 4992

Re: No HDMI Output Although TV is recognized by RPi 3 B+

All 6 devices in that area, the TV, the Pi, the notebook's docking station, the cable modem, a LAN switch and the NAS are on the same bar/strip. It has an on/off switch and a surge protector, which so far I never had to reset. The power bar itself is grounded, but the Pi's and the TV's power adapte...
by Joel_Mckay
Sun Sep 30, 2018 10:31 am
Forum: Troubleshooting
Topic: No HDMI Output Although TV is recognized by RPi 3 B+
Replies: 22
Views: 4992

Re: No HDMI Output Although TV is recognized by RPi 3 B+

Sounds like a troublesome situation, as I had a cheap HDMI cable start to glitch up one machine whenever it heated up. RF shorts are not easily diagnosed with a regular ohmmeter... I would try a different TV input and HDMI cable... as there is a chance you may luck out like I did. However, your stor...
by Joel_Mckay
Sat Sep 29, 2018 9:26 pm
Forum: Troubleshooting
Topic: BerryBoot 'protocol https not supported or disabled in libcurl'
Replies: 17
Views: 2325

Re: BerryBoot 'protocol https not supported or disabled in libcurl'

RetroPie is just a GUI application you can install on Debian Stretch (Raspbian OS just includes Pi specific firmware): https://retropie.org.uk/docs/Manual-Installation/ The core of most of these emulator gui are MAME or RetroArch applications. Many ROMS are under legal copyright in some regions, so ...
by Joel_Mckay
Sat Sep 29, 2018 7:54 am
Forum: Troubleshooting
Topic: BerryBoot 'protocol https not supported or disabled in libcurl'
Replies: 17
Views: 2325

Re: BerryBoot 'protocol https not supported or disabled in libcurl'

@ANARCHY Step-by-step PiDrive install instructions that will probably closely match your project: https://community.wd.com/t/how-to-install-raspbian-on-pidrive-using-windows-pc-step-by-step/134723 If you have a desktop running, than I would also recommend looking at: sudo apt-get install gparted gdd...
by Joel_Mckay
Fri Sep 28, 2018 10:08 am
Forum: Advanced users
Topic: batterry powered Pi in hot areas
Replies: 6
Views: 1408

Re: batterry powered Pi in hot areas

Battery cell voltages change under discharge, so one should use a USB 5A 5v DC-to-DC buck-converter like the XL4015 modules on e-bay. Note these often claim 5A output, but it is usually more like 3A at best due to the components used (unless you plan to fry eggs). The voltage on the regulator module...
by Joel_Mckay
Fri Sep 28, 2018 7:50 am
Forum: Advanced users
Topic: batterry powered Pi in hot areas
Replies: 6
Views: 1408

Re: batterry powered Pi in hot areas

Do you get small enough SLA batteries for a Raspberry Pi? I don't need 12V/7A capacity, as this is the smallest I can see. Spill-proof Absorbed Glass Mat (AGM) type of SLA/VRLA 12v batteries come in every capacity, but minimally a 2.3 Ah or larger battery should be used. The shipping cost is usuall...
by Joel_Mckay
Fri Sep 28, 2018 5:48 am
Forum: General discussion
Topic: Raspberry Pi 3 B+ youtube performance?
Replies: 3
Views: 5164

Re: Raspberry Pi 3 B+ youtube performance?

We built a GPU enabled VLC and Flash version on a patched vc4 Stretch kernel for pi3/pi3B+: https://sourceforge.net/projects/micrometer-cnc-on-raspberry-pi/ One quirk: You have to restart midori once on a page after a bootup for the plugins to load, or the video freezes. We will send you something n...
by Joel_Mckay
Fri Sep 28, 2018 5:20 am
Forum: General discussion
Topic: Looking for timing precision. Do I need a microcontroller?
Replies: 8
Views: 975

Re: Looking for timing precision. Do I need a microcontroller?

You may find an external USB modem to be far less painful to configure... Assuming you can find a real USB adapter that isn't counterfeit (firmware version is usually bogus), the chip will also parse quite a few variants of ODB2 & J1939: modem: https://elm-327.eu/elm_usb chip: https://www.elmelectro...
by Joel_Mckay
Thu Sep 27, 2018 10:53 pm
Forum: Troubleshooting
Topic: dev/spidev not appearing
Replies: 12
Views: 2537

Re: dev/spidev not appearing

Personally, I like the HDMI adapter based LCD touch screens, as the Pi gpu can actually do the mp4 codec playback work.
Also, I use the SPI port for projects ;-)

Cheers,
~J~
by Joel_Mckay
Thu Sep 27, 2018 10:13 am
Forum: Troubleshooting
Topic: Pi2 Model B boot issue
Replies: 2
Views: 320

Re: Pi2 Model B boot issue

In general, I use class 10 Sandisk 32GB sdcards because they are compatible with just about everything. :-) These kind of issues are usually: 1. kernel or card timing are incompatible (an old interrupt handling bug could also be related to the USB messages) 2. overclocked cpu setup fiddling with io ...
by Joel_Mckay
Wed Sep 26, 2018 8:38 pm
Forum: Troubleshooting
Topic: dev/spidev not appearing
Replies: 12
Views: 2537

Re: dev/spidev not appearing

try: ls -l /dev/spi* My old https://sourceforge.net/projects/micrometer-cnc-on-raspberry-pi/ overlay settings in /boot/config.txt ## i2c_arm ## Enable the ARM's i2c interface ## ## Default off. ## dtparam=i2c_arm=on ## i2c_vc ## Enable the i2c interface ## (do not probe i2c bus while video module in...
by Joel_Mckay
Tue Sep 25, 2018 9:09 am
Forum: Troubleshooting
Topic: Raspberry Pi 3 B+ doesn't boot
Replies: 14
Views: 1888

Re: Raspberry Pi 3 B+ doesn't boot

This is nonsense. There are many differences between the 3B and the 3B+, many of which mean that an old image that works on a 3B could never work on a 3B+. Perhaps we should start with what does work on the old system, and try to determine the actual image snapshot age installed: uname -a cat /proc...
by Joel_Mckay
Tue Sep 25, 2018 8:04 am
Forum: Troubleshooting
Topic: Raspberry Pi 3 B+ doesn't boot
Replies: 14
Views: 1888

Re: Raspberry Pi 3 B+ doesn't boot

Some of the other OS options have not yet been updated to support the newer 3B+ model (Ubuntu included). I am inclined to agree, as initially I tried MATE only to see an emaciated deprecated package list. The Raspbian Stretch repo is far from perfect, but at least most of the recent builds are ther...
by Joel_Mckay
Tue Sep 25, 2018 4:56 am
Forum: Troubleshooting
Topic: Raspberry Pi 3 B+ doesn't boot
Replies: 14
Views: 1888

Re: Raspberry Pi 3 B+ doesn't boot

I did an update and upgrade from the old pi with the new sd and tried to insert the same in the new rpi 3 b+ but no use. ... No one seems to have fixed the issue! I am risking another karma-splat from the moderator hammer here, but there is a well-tested Stretch image clone of my tested read-only O...
by Joel_Mckay
Tue Sep 25, 2018 1:34 am
Forum: Troubleshooting
Topic: Raspberry Pi 3 B+ doesn't boot
Replies: 14
Views: 1888

Re: Raspberry Pi 3 B+ doesn't boot

@grajasumant The sdcard you wrote the image on may simply be worn-out or damaged. Also, some makes/sizes of cards do not work right in the pi (PNY cards gave me issues a few years back), and may not report write errors correctly. I have used Sandisk 32GB cards for years without issue, and tend to tr...
by Joel_Mckay
Fri Sep 21, 2018 8:25 am
Forum: Troubleshooting
Topic: Raspberry PI 3 stucks on networking.service on boot Raspbian
Replies: 5
Views: 652

Re: Raspberry PI 3 stucks on networking.service on boot Raspbian

No idea, I simply did the default Raspbian Stretch kernel pull, added the vc4-drm workaround patch manually, and enabled AUFS and Overlay support. One bug remains, in that you need to restart midori once to load flash or youtube video... (If someone has a fix for this, I can mail them something nice...
by Joel_Mckay
Fri Sep 21, 2018 7:57 am
Forum: Advanced users
Topic: batterry powered Pi in hot areas
Replies: 6
Views: 1408

Re: batterry powered Pi in hot areas

The safe operating range for the different LiIon/LiPol cells is usually 4'C to 52'C. Using or changing outside this zone is extremely unwise, as lipol are also exothermic during discharge. Some sites regurgitate manufacturer specified limits as the range limits, but decent charge managers will fault...
by Joel_Mckay
Thu Sep 20, 2018 9:02 pm
Forum: Graphics, sound and multimedia
Topic: Dive Coms
Replies: 9
Views: 2180

Re: Dive Coms

Blimey, those spikes are tiny! I guess the rules are somewhat stricter than for consumer ratings! Thanks for the graph, quite interesting! Everything looks small standing far away, and depends on the orientation of the object relative to the receivers antenna. https://en.wikipedia.org/wiki/Inverse-...
by Joel_Mckay
Thu Sep 20, 2018 12:45 pm
Forum: Graphics, sound and multimedia
Topic: Dive Coms
Replies: 9
Views: 2180

Re: Dive Coms

Whilst we do not claim to pass anything but the consumer electronics EMI standards, just out of interest, where was the spike? Also which model Pi did you see it on and did you have anything plugged in to it? You can have a look at the most problematic spur yourself (*there are a lot more besides t...
by Joel_Mckay
Thu Sep 20, 2018 10:00 am
Forum: Graphics, sound and multimedia
Topic: Dive Coms
Replies: 9
Views: 2180

Re: Dive Coms

I have built marine based systems for several years, and a unshielded Pi unfortunately drops an RF spur in the emergency locator safety bands. You will never pass the ISO EMI lab test with a pi... If you are playing with underwater acoustics, than I would suggest looking at a classic ultrasonic FM t...
by Joel_Mckay
Wed Sep 19, 2018 1:35 pm
Forum: General discussion
Topic: stepper motor driver “BL-TB6560-v2.0” with my pi
Replies: 2
Views: 1427

Re: stepper motor driver “BL-TB6560-v2.0” with my pi

There is a way in RTLinux to direct drive a Pi's GPIO for this kind of thing, but you are much better off using a grbl based Arduino board. We built a GPU based MATE desktop machine control fork on Stretch for 3D printers and machinery: https://sourceforge.net/projects/micrometer-cnc-on-raspberry-pi...

Go to advanced search