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anonymous@undisclosed.example.com (Anonymous) — Tue, 15 Jun 2021 20:09:11 +0000

2012.03.09 - C++0x part 5

due to a chronic lack of free time i publish somehow overdue note on C++0x article, part 5, that was publish last month as a part of SDJ. this part describes one of the most important changes, that went into the C++11 language spec, namely threads.

these are a good news. the bad news are, that once again (second time, to be precise) publisher did not bother to send us an article after typesetting, for a review. last review was terrible. this time it went far beyond that! this is why i recommend you to read HTML work copy, we used for collaborative work.

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anonymous@undisclosed.example.com (Anonymous) — Tue, 15 Jun 2021 20:09:11 +0000

2012.03.09 - tin whiskers

yesterday i had an interesting talk with wojek, regarding RoHS. looks like proud ideas appear to have a second end, after all. it is a common knowledge, that addition of a lead to a tin makes soldering easier. that's not all, however.

because of the allotropy, “raw” tin changes its chemical and physical properties (including dimensions), and the threshold temperature is around 13 deg C. as one can imagine, it is quite common to see electronic devices in temperatures below and above this temperature. and here is where the whole problem starts. soldering is not only harder to perform, but worst of all – far less durable.

Henning Leidecker et al. from NASA performed studies on the case of broken accelerator pedal's electronics in Toyota's cars. metal whiskers do appear after as little as few years of usage. they are tiny (from 0.1 to 0.01 thickness of human hair), hard to detect, and long enough to make random short-circuits in the electronic devices.

reduction of heavy metals used for the production is a good idea. the thing is – is it worth its price?

BaSzErr - blog:2012:03:09

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2012.03.09 - C++0x part 5

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2012.03.09 - tin whiskers