Linux kernel, Linux system development, Software

C++ in Linux kernel

Linux kernel is written in C (and in Assembly in platform-specific portions) language. C language is only one allowed language to write kernel modules. And there is no problem, in most of the cases. But sometimes some stranger things may be required. Let’s see how to use C++ for the Linux kernel modules.

Electronics, Networking, Software

RS-485 practice and theory

Just built two RS-485 adapters (version 2) and decided to write little note about  RS-485 bus (and differential line) theory plus perform some testing of the devices. This material mostly interesting for newbies. In the end of this article you can find a funny way to test this devices đŸ™‚

Uncategorized

Hello HTTPS!

From this point my site is also available via https.   It was not mandatory, but in modern browsers http sites may be marked as ‘unsecured’ and ‘untrusted’. It may happen that in the nearest future all sites without encryptions will be blocked by default in every popular web browser. I don’t want to be badged as ‘untrusted’ or be…

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Electronics

Isolated USB to RS485 adapter version 2

This is a second version of the usb to RS485 adapter. Please read this article about the first version. New device is built with ISO3082 and requires less components. Also this device can provide more reliability in some situations.

Astro tools, Electronics, Radio & antennas

Low noise and low cost amplifier for radio astronomy, 21 cm band.

21 cm band also known as Hydrogen line is one of the important bands in radio astronomy. Please read this wikipedia article if you not familiar with Hydrogen line. Nowadays even radio amateurs can observe this signal from the outer space, thanks to modern hardware. One of the most important part of the any receiver is antenna and input stage.…

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