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Sokol fórum • Zobrazit téma - Parport/Paralelní port/LPT

Sokol fórum

Fórum, které je primárně o ničem a přitom o všem!
http://vincenzo.servegame.com/sokol/

Parport/Paralelní port/LPT

http://vincenzo.servegame.com/sokol/viewtopic.php?f=5&t=22

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Parport/Paralelní port/LPT

PříspěvekNapsal: 18 led 2009 18:31
od raptor483

Re: Parport/Paralelní port/LPT

PříspěvekNapsal: 19 led 2009 11:50
od raptor483

Program cyklicky mění adresu demultiplexoru a podle znaku který se má zobrazovat mění úroveň na gate vstupu. Displeji stačí jeden odpor, protože přes něj teče pořád stejný proud (proud jednou diodou vybranou demuxem nebo žádný, když segment nesvítí). Můžeme počítat s vyšším proudem segmenty, protože diody blikají s velmi malou střídou 1/16. Je dobré, aby celý cykl 16-ti adres probíhal alespoň 50x za sekundu, aby nebylo znát blikání.
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