The best articles on Habr last week

[sumaiyakhatun27]

This article weaves together three topics at once: how some musical polyphonic procedures are arranged on the ZX Spectrum, how to reproduce the result of their work in a completely different implementation on the Arduino, and at the same time a bit of electronics for beginners - reasoning on the topic of how you can correctly or incorrectly connect a speaker to output sound to this very Arduino.

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Hell is overly confident developers writing their own cryptography

Overly confident developers writing their own cryptographic code have been the bane macedonia mobile database of the information security industry since before it even became a separate industry. Many incorrectly claim that they do not implement their own cryptography, because they use a low-level cryptographic library. This error is typical not only for dubious applications that fork messengers with end-to-end encryption in order to cut out forward secrecy.

Several homemade indicator lamps

We continue to work in the home village laboratory-workshop to consolidate and improve skills. This includes mastering molybdenum glass when working on a simple gas welding torch, and the use of specially configured electrodes in lamps to reduce the requirements for precision work, and simplified pumping and filling of lamps with inert gas.