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by alexellis
Thu Mar 16, 2017 1:45 pm
Forum: Beginners
Topic: Tutorial: Build a Timelapse Rig with your Raspberry Pi
Replies: 2
Views: 587

Re: Tutorial: Build a Timelapse Rig with your Raspberry Pi

That's a nice tutorial - hope you don't mind if I put a link to it on my blog :) Mark Please do, that would be great! Since the post I've written a new Python app that takes HDR time lapses by combining 4 pictures. https://www.youtube.com/watch?v=XftecHPC1xE https://www.youtube.com/edit?video_id=Xf...
by alexellis
Thu Mar 09, 2017 4:47 pm
Forum: Beginners
Topic: Tutorial: Build a Timelapse Rig with your Raspberry Pi
Replies: 2
Views: 587

Tutorial: Build a Timelapse Rig with your Raspberry Pi

Create your own Raspberry Pi Timelapse rig https://i.redditmedia.com/xVfTGn7x1t8ZU3e7-3HSxBi3sYvrJs5DILENWJY2zZ0.jpg?w=568&s=05dcc87920ee270df41f32b716ebe147 Follow step-by-step instructions on how to create a portable timelapse rig with your Raspberry Pi and (optionally Docker). Capture sunrise an...
by alexellis
Sun Nov 20, 2016 10:32 am
Forum: Troubleshooting
Topic: Help needed - RAID1 root partition in Jessie
Replies: 0
Views: 399

Help needed - RAID1 root partition in Jessie

Hi, I've been following instructions from http://blog.drewwithers.com/2013/11/raspberry-pi-usb-raid1-root-partition.html - I have a RAID array of two identical disks which work at runtime but I cannot boot from them. I'm unable to boot my Pi 2 after running through the instructions and by trying out...
by alexellis
Fri Apr 29, 2016 3:38 pm
Forum: General discussion
Topic: Raspberry PI Zero back in stock @ PiHut (thepihut.com)
Replies: 20
Views: 5197

Raspberry PI Zero back in stock @ PiHut (thepihut.com)

Just saw this on Twitter... so if you are after a PI Zero get them now. https://thepihut.com/products/raspberry-pi-zero?variant=14062715972 What can you build with a bunch of PI Zeros? A Docker Swarm: http://blog.alexellis.io/content/images/2016/04/pi_swarm.jpeg http://blog.alexellis.io/dockerswarm-...
by alexellis
Fri Apr 15, 2016 7:53 am
Forum: Advanced users
Topic: Tutorial: Build a PI Cluster with Docker
Replies: 4
Views: 3953

Re: Tutorial: Build a PI Cluster with Docker

Absolutely outstanding! We're slowly acquiring Pis to provision our classroom. We have a 20 lab curriculum designed with lab number 19 or 20 being a cluster and lab number 11 or 12 doing Docker. This is the ultimate and we will base our big lab leveraging much of your tutorial. I can't tell you how...
by alexellis
Thu Apr 14, 2016 11:53 am
Forum: Advanced users
Topic: Tutorial: Build a PI Cluster with Docker
Replies: 4
Views: 3953

Re: Tutorial: Build a PI Cluster with Docker

Update:

The PI Zero quick-start edition of the tutorial is now here:

Build a PI Zero Swarm with Docker
by alexellis
Wed Apr 13, 2016 9:56 pm
Forum: Python
Topic: Python/Flask app not working correctly when run with Bash
Replies: 10
Views: 3428

Re: Python/Flask app not working correctly when run with Bas

I use Python/Flask over at https://github.com/alexellis/pyPlaylist to enable audio/radio streaming on the PI. I've had good success using @reboot in Cron. Does my code work on your PI if you add it to @reboot? Btw.. if you upload your code to Github I can try it out on my PI and let you know whether...
by alexellis
Wed Apr 13, 2016 7:47 pm
Forum: Advanced users
Topic: Tutorial: Build a PI Cluster with Docker
Replies: 4
Views: 3953

Tutorial: Build a PI Cluster with Docker

I wanted to share a project I've been working on since October last year, it's also been featured as a tutorial in Linux Developer & User in the RasPI section. And on @Docker over on Twitter https://twitter.com/docker/status/715629498365059073 Build a PI Cluster with Docker Swarm http://blog.alexel...
by alexellis
Thu Apr 07, 2016 9:14 pm
Forum: General discussion
Topic: NEW HDD FOR RPI's
Replies: 39
Views: 7529

Re: NEW HDD FOR RPI's

Tonight I've tried four different 5v PSUs each rated at 5v/2A with both a PI2 and PI3 (determined to get this product working). Then I got a Seagate 1TB USB drive and plugged it straight into the PI2 (with max current = 1) and it not only booted, but mounted quickly and let me read data off it... A...
by alexellis
Thu Apr 07, 2016 8:15 pm
Forum: General discussion
Topic: NEW HDD FOR RPI's
Replies: 39
Views: 7529

Re: NEW HDD FOR RPI's

Tonight I've tried four different 5v PSUs each rated at 5v/2A with both a PI2 and PI3 (determined to get this product working). Then I got a Seagate 1TB USB drive and plugged it straight into the PI2 (with max current = 1) and it not only booted, but mounted quickly and let me read data off it. Perh...
by alexellis
Thu Apr 07, 2016 8:00 am
Forum: General discussion
Topic: NEW HDD FOR RPI's
Replies: 39
Views: 7529

Re: NEW HDD FOR RPI's

This: In many/most cases, the 314 drive can be plugged directly into the Pi's USB port without a powered hub. We don't state this as a feature because feasibility depends on many factors- peripheral load and activity, length and quality of USB cables, etc. I bought a PiDrive.. at full price, then w...
by alexellis
Tue Jan 26, 2016 12:47 pm
Forum: Troubleshooting
Topic: Reliable USB ethernet for Raspberry PI
Replies: 5
Views: 1386

Reliable USB ethernet for Raspberry PI

I bought two USB - ethernet adapters from eBay, which turned out to crash the PI's kernel as soon as any data over a few KB was transferred through it. I found an article somewhere on Google collaborating the fact that they are not strictly compatible with the PI naming the chipset. I've searched th...
by alexellis
Thu Sep 10, 2015 11:09 pm
Forum: Arch
Topic: Guide: Provision the Raspberry PI with Arch Linux
Replies: 2
Views: 2313

Guide: Provision the Raspberry PI with Arch Linux

I have put a small guide/blog post together on setting up Arch Linux Arm on a Raspberry PI - primarily as a headless installation. I don't find it any harder than using ISO images now that I've got used to the process. If this is of any use to you please let me know. Likewise if you have any other f...
by alexellis
Thu Jul 16, 2015 5:52 pm
Forum: Python
Topic: Python GPIO control slow script...
Replies: 13
Views: 4481

Re: Python GPIO control slow script...

sixaxis is not a standard python library, it was pinched from 'CamelSoftware': http://www.camelsoftware.com/firetail/blog/python/using-a-ps3-sixaxis-controller-with-python-on-linux/ The guy wrote a threaded python class which reads the /dev/input/js0 device over and over again. The alternative would...
by alexellis
Thu Jul 16, 2015 2:13 pm
Forum: Automation, sensing and robotics
Topic: Sixaxis PS3 controller woes
Replies: 0
Views: 907

Sixaxis PS3 controller woes

I struggled to know which sub-forum to post this in. I want to use a PS3/sixaxis controller to control a robot under Arch Linux on a Raspberry PI 2. I've started out by following tutorials and quickly found that the controller I was sold as genuine (I paid extra for this) was a replica. I would run ...
by alexellis
Fri Mar 13, 2015 2:54 pm
Forum: Raspbian
Topic: Nginx + Ghost login = 100% CPU
Replies: 1
Views: 801

Re: Nginx + Ghost login = 100% CPU

Hey guys, I installed nodejs and ghost blogging platform on my raspbian. The site runs really good and the performance is great but when i try to login to the admin panel /ghost with my user and pass it hands for a mnute and returns: The server returned an error (504 - Gateway Time-out). I logged t...
by alexellis
Sun Jan 11, 2015 8:58 pm
Forum: Raspbian
Topic: Best way to auto-recover from power cuts?
Replies: 10
Views: 1480

Re: Best way to auto-recover from power cuts?

Right.. I see the typo is what all the fuss is about. Auto correct gone mad. Unfortunately the linked article does not help with automating the solution. I know how to use dosfstools from the physical PI or another Linux machine with SD card reader. Is there a service I can enable which will check t...
by alexellis
Sun Jan 11, 2015 8:01 pm
Forum: Troubleshooting
Topic: Volume was not properly unmounted ...
Replies: 46
Views: 122665

Re: Volume was not properly unmounted ...

Can this process be automated on boot up? I have some headless Raspberry PIs running at another house and this means driving over there after each power cut.
by alexellis
Sun Jan 11, 2015 7:57 pm
Forum: Raspbian
Topic: Best way to auto-recover from power cuts?
Replies: 10
Views: 1480

Re: Best way to auto-recover from power cuts?

Install a UPS? Set your filesystem to read-only? You have my sympathy. Psychically accessing a headless Pi must be very tricky. I'm detecting sarcasm here but I have at least one PI running remotely now - which means driving to and accessing another house to sort it out each time there is a cut and...
by alexellis
Sun Jan 11, 2015 7:54 pm
Forum: Raspbian
Topic: Best way to auto-recover from power cuts?
Replies: 10
Views: 1480

Re: Best way to auto-recover from power cuts?

my headless pi has no problem recovering from a power cut.. could you be more precise? Hi, as I mentioned above I have to run dosfsck on the boot partition in order to be able to boot once I've had a power cut. This has happened twice in the last two weeks on two different locations on three PIs. W...
by alexellis
Sun Jan 11, 2015 7:38 pm
Forum: Raspbian
Topic: Best way to auto-recover from power cuts?
Replies: 10
Views: 1480

Best way to auto-recover from power cuts?

It seems like after every power cut my headless Raspberry PIs require manual intervention - involving psychically accessing the PI, removing SD card and then running dosfsck on the boot partition - only after these steps will the PI boot again and allow network access over SSH. Is there a way that a...
by alexellis
Fri Jan 09, 2015 10:37 pm
Forum: Troubleshooting
Topic: Is my PI dead?
Replies: 7
Views: 941

Re: Is my PI dead?

is there a chance the capacitor could have fried something being put in the breadboard the wrong way? Not really. It could short the a GPIO to GND in the worst case, but that would not immediately cause fatal damage. The fact is the the PWR LED went off, which meant the 3V3 totally disappeared, whi...
by alexellis
Fri Jan 09, 2015 10:29 pm
Forum: Troubleshooting
Topic: Is my PI dead?
Replies: 7
Views: 941

Re: Is my PI dead?

Because if you just used the circuit described there is not much change you damaged your PI so much it won't boot, besides the so probably would be untouchable hot because of the internal short that causes such damage. You probably just mucked up the card due to the short power fail. It is possible...
by alexellis
Fri Jan 09, 2015 10:15 pm
Forum: Troubleshooting
Topic: Is my PI dead?
Replies: 7
Views: 941

Re: Is my PI dead?

Thanks for pointing out that sticky post. I have read it, but I don't know which point you are suggesting is relevant? The lights are not flashing n times, they are just on and do not turn off. The power supply is good, I've used another known SD card already in there and it didn't boot. You say the...
by alexellis
Fri Jan 09, 2015 10:04 pm
Forum: Troubleshooting
Topic: Is my PI dead?
Replies: 7
Views: 941

Is my PI dead?

I was trying to follow a capacitor/LDR measurement example from below: http://www.raspberrypi-spy.co.uk/2012/08/reading-analogue-sensors-with-one-gpio-pin/ ... when I connected the circuit I saw the ACT/PWR lights go off, then PWR came on followed by ACT. I tried to log in with SSH because I use all...

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