Docker is a great way to fully describe and implement an installed Linux environment, and we make use of it at work as part of our continuous integration system to provide a clean environment for the jobs that we run.Unfortunately, the main public repo (docker.io) currently only contains images for x64, so if you want a different architecture, you may need to build it yourself.

In this situation, I required a Fedora 23 image on Power PC. I started with a working Fedora 23 in PowerKVM.

The problems I had to address:

A while ago I got hold of a couple of DLink DIR-865L AC1750 802.11ac routers as there was a generous cashback offer.

I was originally using it as a glorified access point, but since updating my main router to carve off a variety of ethernet segments for home automation, guest networks, etc, I wanted to expose these as different wifi networks, using the DIR-865L units to extend the wifi network, with ethernet backhaul to the main router.

To get OpenWRT onto the router (where the router's IP is 10.0.1.200 and the tftp server is 10.0.1.16):

I just replaced my Asus DSL-N13 with a new DLink DSL-2740B ADSL modem as the Asus unit would not allow me to access servers (such as mail servers) that are hosted on my local network and port forwarded from the router, when the computer attempting the connection is also within the local network.

Imagine my dismay when the new router had a similar web interface, and exhibited the same problem!

As part of my tinkering with 802.15.4, I needed a way to bridge the divide between my computers and the microcontrollers. My initial idea was to build an ethernet to 6LoWPAN router, but this was soon shelved due to the complexity of the beast.

In a desperate attempt to reclaim space in our house, heres is stuff I don't need. I'm open to offers on everything.

All items are located in Canberra, Australia.

In order to minimize component count, stocked items in my junk box, and to improve efficiency as well as have software control of the power supply, I wanted to do away with inefficient, standalone linear regulators and instead use spare PWM pins on the microcontroller to generate voltages instead.

This library creates a simple feedback loop, where you specify the target voltage, and the microcontroller alters the PWM duty cycle to create the requested voltages.

Our 1.5kW Solar System from Beyond Building Energy was installed yesterday!

I picked up one of these IP cameras manufactured by Foscam on Ebay relatively cheaply. The unit itself is a Foscam FI8903W, but this is not written anywhere on the camera, box or manual - I gleaned it from one of the promotional images the Ebay vendor was using.

After upgrading my desktop to Windows 7, my second head (a Viewsonic VX2835wm) was showing a horribly overscanned image (blurred text, edges cropped). After fiddling with the monitor settings and setting the aspect ratio to 1:1, I then ended up with letterboxed image, with missing information around the edges (eg, the Windows start menu was off screen).

According to nVidia, this should already be accounted for in their drivers (from the release notes for 191.07):

I finally got around to upgrading my desktop to Windows 7. After backing up my Vista desktop to a network share, I reinstalled. Upon reinstalling, I went to mount the VHD created (The Lazy Admin has an easy procedure documented), but I kept getting a cryptic error dialog "The version does not support this version of the file format.".