kopia lustrzana https://github.com/bristol-seds/pico-tracker
28 wiersze
773 B
Markdown
28 wiersze
773 B
Markdown
## PCB Weight ##
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The density of FR4 is 1,850 kg/m^3. If we assume a PCB area of 12*50 =
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600 mm^2...
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For a 1.0mm PCB: 600 * 1.0 * 1.85 = 1.110g
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For a 1.6mm PCB: 600 * 1.6 * 1.85 = 1.728g
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## Contestia ##
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There doesn't appear to be much documentation for contestia...
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[Oh here's some](http://f1ult.free.fr/DIGIMODES/MULTIPSK/contestia_rttym_en.htm)
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Really we're looking at Olivia MFSK - contestia is just a variant.
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[Wikipedia](http://en.wikipedia.org/wiki/Olivia_MFSK)
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[ARRL](http://www.arrl.org/olivia)
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It's already implemented in dl-fldigi [here](https://github.com/jamescoxon/dl-fldigi/blob/master/src/include/jalocha/pj_mfsk.h)
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(Inverse) Fast Hadamard Transform needed
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## APRS ##
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[some description..](http://dooce.de/dokuwiki/doku.php?id=projekte:utrak:aprs)
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