Archive for July 2013

EEWeb interview

I was interviewed by EEWeb Electrical Engineering Community. The interview is published now with title Featured Engineer: Tomi Engdahl – webmaster. This is not my first interview for this reason. Years ago Elektor Electronics magazine interview me Tomi Engdahl – the man behind

Arduino cellphone

Hackaday mentioned some time ago an interesting Arduino cellphone. The fact that you can build a cellphone around an Arduino is pretty neat: An Average Joe can build this thing with a minimum or background knowledge and without breaking the bank. Wow. The components include and Arduino Uno, GPRS shield from Seeed Studios, a TFT

Why mobile web apps are slow

Web technologies like HTML5 are the future of mobile application development, but there are also problems: many Mobile web apps are slow. JavaScript performance is essential to many modern web apps. When Java applets failed, JavaScript became the language of the Web. One big reason for slowness of many mobile apps is that is that

Dimming LED sources

I just happened to find an interesting presentation on light dimming technologies and who they work with LED lighting. Dimming LED sources: what’s working and what still needs fixing is a worth to take a look if you are into LED lighting or light controlling applications. It is a very good overview of the current


Cool Firefox AddOn: Poster article mentions a cool utility for non-unix users, who have been looking for a curl like solution for sending HTTP requests with the various HTTP methods – GET, POST, PUT, DELETE, etc. It is the Firefox add-on Poster. Poster is a developer tool for interacting with web services and other web

The History of CTRL + ALT + DELETE

The History of CTRL + ALT + DELETE article tells that in spring 1981 David Bradley created a keyboard shortcut that triggered a system reset without the memory tests. In the fall of 1981, the IBM PC hit shelves. It wasn’t until the early 1990s, when Microsoft’s Windows took off, that the shortcut came to

The future of cinema and TV

The future of cinema and TV: It’s game over for the hi-res hype article claims that all you’ve ever been told sold about moving pictures is wrong. In this article digital video guru John Watkinson (author of The MPEG Handbook) examines the next generation of TV and film and reveals it shouldn’t be anything like is an interesting on-line service that allows you to check the speed, GZip compression, and other vital stats of Your Site! Just type in the URL you want to check, press button and read the report. This is easy, useful and free. I dropped to this site accidentally one day and found it turned


When I was researching for my BeagleBone Black I saw in material two things I had read about earlier: Cloud9 IDE on node.js. I wanted to test node.js. Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model. The idea of using