I’ve been looking for a way to make a semi-permanent connection to the connector on the Arduino micro-controller.
The onboard connectors are female PCB header connectors. These are ideal for prototyping as you can stick solid core wires into the connectors, but these are not so good for connecting to another PCBs or external devices. [...]

The LPI practice exams on PenguinTutor are now fully updated to the current LPI exam guidelines.
The Linux Professional Institute updated the objectives in 2009. At the time I went through validating the questions on PenguinTutor.com were still valid, but it looks like I didn’t make all the changes required.
Most of the questions are still [...]

This is a book review of a book for artists. The review is being written by someone that is not much of an artist. You need to keep this in mind when reading this review.
I am an engineer and experienced programming, perhaps the complete opposite of the target audience of this group. Although Processing is [...]

I have recently been having a go with the Processing programming language.
You can see my first attempt in the Interactive Diode circuit demonstration – Processing / Java applet on PenguinTutor.com.
I really do like the language. It was ideally suited to the applet that I have created and I hope to add a few more soon. [...]

I’ve recently been learning the Processing programming language. This is a programming language created for artists which is also the basis for the programming language used to program the Arduino. Processing includes an IDE called the Processing Development Environment (PDE), but the editor is quite basic.
The IDE has an option to use an external [...]

I’ve now completed a major reorganisation of the PenguinTutor web site. This is the most significant change to the site since it was launched in 2006.
The first reason for the change is to reorganise the content. Although it appeared to make sense at the time some of the categories were not as logical as [...]

As of today I am now a Certified Linux Administrator for SUSE Linux Enterprise.
This is due to a partnership between LPI and Novell. I have already qualified as Advanced Level Linux Professional (LPIC-2) through Linux Professional Institute Certification (LPIC), which now gives me free certification from Novell.
If anyone has already qualified to minimum [...]

Practical Arduino is not a book for complete beginners, but it still starts off quite gently. It does assume that you already have an Arduino and have figured out how to create a sketch and push it to the Arduino. This is not a huge step as most of the info is on the Arduino [...]

Although knowledge of the command line is not required to use Linux sometimes it can come in very helpful. renaming files is one area where it is often quicker and easier to batch rename a number of files using a command line program or short script.
mv
The normal command for renaming a file is mv (move). [...]

Dropbox provides a folder on your computer, which can be shared across multiple computers, across multiple operating systems, across the Internet or a LAN.
If you ever need to access your files across multiple PCs then you need
Dropbox!
I was a little sceptical when I first heard of Dropbox. My first thought was that there are already [...]