Go to advanced search

by paulv
Wed Apr 26, 2017 1:45 pm
Forum: Other projects
Topic: New mini UPS hat for our Raspberry Pi
Replies: 10
Views: 3463

Re: New mini UPS hat for our Raspberry Pi

Francisco, Have a look here : https://flashcandy.us/products/5v-3a-ups-for-raspberry-pi-beagleboard-arduino They have used the same booster chip as you do. From what I can gather, this is a power supply with a UPS function "only". The power can't be turned off and the RPi will not get restarted auto...
by paulv
Tue Apr 25, 2017 8:05 pm
Forum: Other projects
Topic: New mini UPS hat for our Raspberry Pi
Replies: 10
Views: 3463

Re: New mini UPS hat for our Raspberry Pi

Hi Francisco, Nice job, there will be a market for it, I'm sure. I have some experience designing UPS supplies for the RPI family, most of them are actually published on this forum. The biggest hurdle is to create a booster circuit that will supply 2 Amps or more (for the Model 3), with a cell volta...
by paulv
Sat Apr 15, 2017 1:24 pm
Forum: General discussion
Topic: Python IDE
Replies: 17
Views: 55844

Re: Python IDE

I have been using PyScipter (version 2.6.0.0 x86) on my WPC in combination with Samba and PuTTY on the RPi for several years now. It is a full blown IDE and well integrated with Windows. I always run my RPi's headless and use PuTTY. Because PyScripter is fully integrated with Python on the PC, you c...
by paulv
Wed Mar 29, 2017 11:55 am
Forum: Advanced users
Topic: HOWTO: create an SD image to use as a master?
Replies: 10
Views: 3132

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

Good point FM81, In that case, I can see two options that can be used. 1. Delete some bloatware before installing Gimp. Things that come to mind are wolfram-engine, games like scratch minecraft-pi, penguinspuzzle, sonic-pi, dillo, gpicview, oracle-java8-jdk, openjdk-7-jre, oracle-java7-jdk, openjdk-...
by paulv
Wed Mar 29, 2017 7:56 am
Forum: Advanced users
Topic: HOWTO: create an SD image to use as a master?
Replies: 10
Views: 3132

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

When a new SD card is loaded with a new version of the OS, /boot/cmdline.txt contains a command to execute a script on the very first boot of this SD card. It expands the filesystem to use all space on the SD card, then removes itself from the cmdline file. This automatic method was added to help pr...
by paulv
Wed Mar 29, 2017 6:37 am
Forum: Advanced users
Topic: Wake from halt
Replies: 76
Views: 68253

Re: Wake from halt

The method described in the following post provides a simple one-button start-stop solution.
viewtopic.php?f=37&t=140994&p=1120289#p1120289
by paulv
Mon Mar 20, 2017 8:09 am
Forum: Automation, sensing and robotics
Topic: Add an analog output to the Pi (DAC)
Replies: 15
Views: 17421

Re: Add an analog output to the Pi (DAC)

Good point kosaku, I overlooked that additional change and it proves once again that you need to test your code...
Thanks for contributing!
by paulv
Thu Mar 09, 2017 10:41 am
Forum: Advanced users
Topic: STICKY: HOWTO: Move the filesystem to a USB stick/Drive
Replies: 339
Views: 519868

Re: HOWTO: Move the filesystem to a USB stick/Drive [updated

I just updated/upgraded to 4.4.50+ #970, and when running raspi-config, there is indeed nothing yet about the new booting from other devices than the SD card in there. Still not "main-stream".
by paulv
Tue Mar 07, 2017 8:56 am
Forum: Raspbian
Topic: [solved] Latest Kernel & Firmware broke my RPi 3
Replies: 17
Views: 5712

Re: [solved] Latest Kernel & Firmware broke my RPi 3

gkreidel, thank you, I just took the warning away from the original post. Dougie, I also highlighted the RPI Model 3 procedure as being different, to mke it stand out more, but at this moment, the following link is still the only reference I have : https://github.com/raspberrypi/documentation/blob/m...
by paulv
Tue Mar 07, 2017 8:49 am
Forum: Raspbian
Topic: [solved] Latest Kernel & Firmware broke my RPi 3
Replies: 17
Views: 5712

Re: Latest Kernel & Firmware broke my RPi 3

gkreidl,
So can we take the warning away again?
Maybe you can edit/delete you post with the big red warning? ;)
by paulv
Tue Mar 07, 2017 8:03 am
Forum: Raspbian
Topic: [solved] Latest Kernel & Firmware broke my RPi 3
Replies: 17
Views: 5712

Re: Latest Kernel & Firmware broke my RPi 3

I have added a warning to the procedure intro about moving the OS to a USB drive.
If possible, I hope a fix is communicated in this thread, so as soon as there is a fix, I can update the procedure again.

Too bad, there is no way to warn users before they do the upgrade...

Tks,

Paul
by paulv
Sun Feb 26, 2017 7:03 am
Forum: Automation, sensing and robotics
Topic: Halt-Restart with 1 Button
Replies: 5
Views: 8394

Re: Halt-Restart with 1 Button

Hi Mike,

I have not tried it recently with the latest OS version, but there is no reason why not.
Give it a try!
by paulv
Fri Feb 10, 2017 4:16 pm
Forum: Advanced users
Topic: Wearout Prevention of SD card memory
Replies: 39
Views: 57036

Re: Wearout Prevention of SD card memory

I have been using busybox-syslogd for a couple of months now, and I'm happy with it. The syslogd setup replaces the logging to the filesystem, and stores the log into a RAM based ringbuffer. It is especially made for embedded systems, diskless systems, or, -tada- flash disk based systems. Google it ...
by paulv
Mon Feb 06, 2017 10:50 am
Forum: Automation, sensing and robotics
Topic: Add an analog output to the Pi (DAC)
Replies: 15
Views: 17421

Re: Add an analog output to the Pi (DAC)

Hi Magnus354, I'm not sure that I understand what you mean by your question to "record" the resulting signal. To see the result of the digital to analog conversion, you can use an oscilloscope or an analog data logger to look at the signal, and record it. You can also use an analog to digital conver...
by paulv
Wed Jan 25, 2017 8:51 pm
Forum: Media centres
Topic: How-To: Un-geoblock Netflix and cast movies to a TV
Replies: 12
Views: 23821

Re: How-To: Un-geoblock Netflix and cast movies to a TV

No ab1, it's not the same. Although a nice setup, it is no different than using a commercial VPN setup, and they can be/will be blocked because their IP addresses can be easily found and blocked by the likes of Netflix, as has been done by many other VPN's already. That happened to me, as you can re...
by paulv
Tue Jan 17, 2017 1:58 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Move the filesystem to a USB stick/Drive
Replies: 339
Views: 519868

Re: HOWTO: Move the filesystem to a USB stick/Drive [updated

Thank you for the tip, I've added the command to edit /boot/cmdline.txt.
by paulv
Thu Jan 12, 2017 3:42 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Re: Bricked pi2b after rpi-update.

First of all, I goofed with the current consumption. Typing on an iPad has it's challenges. The current is about 40mA, not 4. I cannot see a clock on my scope coming from the X1 x-tal. I see a steady 0.7V on pin1 and only some noise on pin3. If I "hoover" with my probe closely above the PCB, there i...
by paulv
Wed Jan 11, 2017 1:43 pm
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Re: Bricked pi2b after rpi-update.

Hi RaTTuS, Everything is stone cold. I'm not surprised because total current consumption is about 40mA. (typo!, erlier showed 4mA) When I supply 5V02 (supplied by a bench supply through P1), I measure 5V02 at P1-2 and C3, 3V33 at P1-1 and also at C7, and 1V80 at C8. Around U16, I measure 5V at C161,...
by paulv
Wed Jan 11, 2017 12:23 pm
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Re: Bricked pi2b after rpi-update.

Send flowers?

The QR-code is too small, I tried two apps, and they can't read it.
by paulv
Wed Jan 11, 2017 11:37 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Re: Bricked pi2b after rpi-update.

Thank you gregeric, I now have all that I need to engrave a tombstone for my 2B. What I still need is the cause of death to put on the death certificate, needed for burial permission. I can't except "natural causes" though, that still won't fly. While waiting for that, I'm still debating organ donor...
by paulv
Wed Jan 11, 2017 8:25 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Re: Bricked pi2b after rpi-update.

Yep the code on the SoC indeed missed a "1" this one is laser engraved and difficult to see, even under an LED lamp with magnifying glass. The RAM really says 15300R03100, I double checked. The SD card has : 50930AC The silkscreen has : "delta", RU-reversed and then KCE MC1 1540, V-OF3, 7-1 Hi Phil,...
by paulv
Wed Jan 11, 2017 7:14 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Re: Bricked pi2b after rpi-update.

This is a Pi 2 Model B V1.1, made in the UK. It has a tiny QR-code sticker on the back with what seems like a date code (28/11) I purchased it in 2016, so it was maybe manufactured on November 28, 2015. The Broadcom chip has this: BCM2836RIFBG, TE154, P10, 544925-22 N3 W The Elpida RAM chip has this...
by paulv
Wed Jan 11, 2017 6:45 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Re: Bricked pi2b after rpi-update.

This was posted in the advance section to avoid getting the obvious shooting from the hip replies... I tend to check the posters credentials before I offer advice, rather than getting my postings score up. If you would check my posts on this forum, you could see that I'm pretty experienced with Gpio...
by paulv
Tue Jan 10, 2017 5:09 pm
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4460

Bricked pi2b after rpi-update.

I'm putting this in the advanced section for a reason. To qualify, I have more than 3 years of experience with many RPI's, and I'm an electrical engineer by trade, albeit catching-up from wisdom collected decades ago. First of all, the reason I had to revert to rpi-update is because the cifs drivers...
by paulv
Mon Jan 02, 2017 4:36 pm
Forum: Automation, sensing and robotics
Topic: Adafruit DHT temp/humid sensor
Replies: 76
Views: 41920

Re: Adafruit DHT temp/humid sensor

By now this is a pretty old post, but I think still valuable if you are trying to use the DHT11, DHT22 or the AM2302. Previously, I only worked with the DHT22 and the AM2302. Just for the sake of completeness, I installed the spidev driver on the latest kernel, and the only thing that changes is the...

Go to advanced search