Category: Open Source

Tiny Encoders for DC motors

Hi again! Today I’ll show you a small part of a project that I did a long time ago and, due to some changes of plans I didn’t end up using. Anyway, maybe this small project might come up handy for you. Some time ago I went to a junkyard to salvage two powerful high…




Zeitgeist-daemon using all the CPU

Hi there! 🙂 Some time ago I had a problem in my Ubuntu installation. All of a sudden, I had some weird process using all the CPU, causing the computer to become really slow and hot and making the laptop fans go crazy. Since I use conky, I quickly verified that the weird process causing…




How to Install LibreOffice 4.0 in Ubuntu 12.04

Hi there! I don’t know if you’ve heard about it but this week we had some great news for the open source community and Linux: LibreOffice 4.0 has just been released. 🙂 I’m not going to describe all the new features and improvements since you’ll get a better glance at them by visiting the release…




How to install HeeksCAD in Ubuntu 12.04

Hi! In a previous post where I wrote about the CNC Software Toolchain for Linux I mentioned HeeksCAD, which is a great software to generate the toolpaths from the 3D models for CNC machining. Since I upgraded to Ubuntu 12.04 I started having some problems with the HeeksCNC plugin and some features like the pocketing and…




The Hackerspace Movement: Mitch Altman at TEDxBrussels

Hi! Following my previous post about the eLab Makerspace Today I’m just going to share a video that I saw today and honestly think that everyone who loves learning, making, tinkering, should see (and everyone who doesn’t should see it too!). It’s a video about the history of Hackerspaces and the Maker movement that includes…




CNC Controller Board v2

As I said previously, I have been slowly developing my second CNC Machine, TheMaker2. To control the new CNC machine I developed a new board based on a PIC16LF877A since the L297‘s that I used on the first CNC controller board that I designed can be quite expensive here in Portugal and I had some…




Homemade CNC: TheMaker2

Hi! As I previously said in my first post about my first Homemade CNC: TheMaker1, I was slowly developing a bigger, faster (didn’t accomplish this part yet) and more robust CNC. Well, the development phase has finally come to an end and it is finally ready! 😀 In order to build a more rigid structure I…




How to locate files in linux

Hi! Have you ever needed to find some files in linux? Here’s a quick and easy “How To” on it. To locate files you can use the command “locate” (yes, to locate, use “locate”, pretty obvious, huh? :P). If you know the name of the file just launch a terminal and write: locate “filename”  …




How to resize multiple images at once

Hi! This post is about a common need for everyone. That’s highly probable that, at least once, you needed to resize lots of pictures, either to spare some storage space or just because you needed them to have a specific size for some reason. Below you’ll find a script to do it with no effort…




How to create a video from multiple images

Hi! If you work with computer vision maybe you have had the need to generate a video from a sequence of images, in order to get a dynamic view of your results. I’m going to show you a very easy way to do that with a simple command, using ffmpeg 🙂 .   So, let’s…