Codingcolor Arduino RTC LCD clock with Chronodot

I recently started experimenting again with Arduino and must say I am having a lot of fun.

Chronodot Arduino and LCD RTC clock
Chronodot Arduino and LCD RTC clock

I had the idea to implement an RTC clock with arduino and excellent Macetech Chronodot and got myself the needed parts from Adafru.it. As it often turns out with Arduino project, someone already had the same idea (and luckily they used the Chronodot too): before reinventing the wheel a fast google search revealed “An Arduino LCD clock using the ChronoDot RTC”.

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Cryptswap and Linux assigning different devices letters to disk

I had this weird issue recently: I had a simple Ubuntu setup with cryptesetup and swap, and the crypt swap device (say /dev/mapper/mycryptoswap1) keept disappearing.
Caution: fiddling with cryptsetup and disk devices is dangerous for data and OS. I personally made a full backup on a separate disk and then umplugged it to be sure it wouldn’t be involved in any mishap.

Turns out is a little worse that that: Linux is changing the drive devices assignations (eg /dev/sdb /dev/sdg) at every boot under my nose. I did not notice at first because I am using UUIDs, so everything looked fine. Unfortunately my raw partition did not have any UUID.  Probably there’s a way to assign an UUID to a general partition, but I didn’t address this issue.
Having the disk changing its letter any time was the reason why the crypttab device wasn’t created a boot.  I was lucky: would a partition with valuable data be present in the other disk, it would be overwritten with encrypted swap data.

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Linux Kernel 3.6 is here

I had to upgrade a Pangolin Precise to Linux 3.6 to issue a bug on Linux Vs my Logitech mouse. So far I can say: Nvidia_current 295.40 fails to build module in 3.6.0 amd64 (I suspect it would also on i386) Solution: install nvidia-current 304.51 from ubuntu xedgers. Works out of the Box. Vmplayer VMware … Leggi tutto

Wi-fi for PowerPC powermac G5

I recently bought a PowerPC Powermac G5. I was very fond of this computer back in 2007, when for various reasons I could not afford it. Simply too much stuff for me!
Now I had it for a ridiculous price and got it back to life. A lot of RAM (DDR2 still come cheap these days), a new OS, some up-to-date apps. Of course the G5 didn’t have any Wifi card available, so I had to turn to the used market. There’s the standard Apple Airport card, but getting it is expensive, and I don’t want to spend a lot on this marvellous piece of hardware. Moreover I want to limit the direct tweaking inside the case as much as I can.

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