DIY

All robot builders reading this, take a look at this video you can find at http://wimp.com/pointlessmachine/. It shows a pretty useless but kind of funny robot in a box. →

I had some stepper motors from old disk drives and other electronics devices lying around. Those were typically designed to be driven with 12V voltage and take few hundred mA of current per phase and had five or six wires (four phase). I thought that it would be a good idea to turn them to →

Touch interfaces are hardly futuristic at this point, but multi-touch hardware like the Microsoft Surface or the iPhone is just starting to become a big deal. Now it is time to learn how they work and maybe try to build our own. maximumpc.com site has published an interesting article called “Build Your Own Multitouch Surface →

Here is one useful trick I invented when looking around the transformers/power supplies I had. NOKIA ACP-7 Europe Standard Charger (Original) has a specification of 230 V, 50 Hz, 4.8 VA. Output 3.7 V, 355 mA. A normal 1W white LED is driven with 350 mA maximum continuous current and typically 3-3.8V voltage drop over →