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Don’t be afraid of a long learning curve
This post is a little bit different. It does not contain any how-to, know-how or data. It is a little thought that I came to after a recent experience. Don’t be afraid of a long learning curve – it...
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Transistor power dissipation
How to choose the right switching transistor for my application? It must withstand the current, generated heat and applied voltages. Current and voltage does not pose any problem. You have to use some...
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Single button push on push off
Turning circuits on and off by a toggle switch is so old school. Today devices have a single push button and that button can power up or down the device with a single push without much force applied....
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OSH Park PCB prototyping
I’ve sent a little LED dimmer PCB to OSH Park service. For 4.6 USD it is a great deal. Vias are 0.8 mm in diameter and 0.3 mm drill. SMD components are 0805. The result? Very good. The order was sent...
View ArticleWindows 8 SDK
MS Visual C++ 2012 SDK might be already mature enough and lots of libraries are being built with this version these days. Its support for C++11 is also supposedly better so lets try it. This is not a...
View ArticleXubuntu upgrade to 13.10 with troubles
New (X)Ubuntu switched to systemd and it brought new challenges with upgrading. I use Xubuntu fork but this might affect others as well. I can’t turn off or hibernate the computer. Even after logout...
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Elecrow PCB prototyping
Another quick PCB manufacturer review. This time it was an audioohmmeter sent to Elecrow PCB service. Price was $9.90 + $3.72 shipment. I ordered 5 pieces, got 10. Nice! Overall quality looks very...
View ArticleMS VC++ 2012 and Windows XP
MS VC++ 2012 is installed, development environment is fine tuned with all necessary libraries, QT and boost are no longer complaining about missing components etc… Then you find out that your...
View ArticleHibernation and turning swap off
Having 16 GB RAM today is nothing extraordinary. Swap seems to be a useless thing. And it perhaps is. Even if you are able somehow fill up those gigs of memory then it is caused probably by some...
View ArticleVIM auto save spell checking language
If switching between languages is frequent then having a fixed default spell checking language on every start is not very comfortable. This simple plugin solved my issue: let...
View ArticleLinux full disk encryption
Set up reasonably secure encryption without sacrificing too much computing power. I had previously configured only a single encrypted partition but the PAM unlocking caused many troubles. Advantage of...
View ArticleMissing icons in Xfce systray
There are 2 plugins for the Xfce panel for systray icons: notification area, indicator plugin. The first one is the right one, the second one is very obsolete. What happened to me was that the...
View ArticleZsh completion with visual hints
Have you ever tried to complete a command that takes longer time? Like a remote server path completion for scp. It takes few moments and after pressing <TAB> you don’t know if there is nothing to...
View ArticleReserve virtual memory
I needed to load a huge amount of data into memory. It had to be a continuous chunk of memory and I could not tell the size from a beginning. C++ std::vector is a good candidate however its downside is...
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