Ochrana logickych vstupu

[Janko]

100R - harris sp720(721) - 100R - PIC. Vyvod + sp720 na K-BZW5v8, 10K z VCC tamtiez ako predpatie. Znasie: 15kV human body model, 1.5A overcurrent trvale.

Jan.

Snail Instruments wrote:
> 
> Resim tento ukol - jakou primerenou ochranu poskytnout 'TTL' vstupum
> pristroje. Zatim jsou pouzity primo vstupy PICu, akorat pres maly odpor
> ~100R (PIC ma ocharnne diody na VSS a VDD). Ke vstupum budou pripojeny
> nejake jine aparatky nestinenym kabelem delky tak 2m. Prostredi - chemicke
> laboratore.
> 
> J. Hanzal
> 
> =======================================================================
> Electronical devices for chemical laboratory, custom electronics design
> -----------------------------------------------------------------------
> Snail Instruments                      Josef Hanzal, M. S.
> Vojanova 615                           phone/fax: +420-311-24433
> 266 01 Beroun                          e-mail: snail@iol.cz
> Czech Republic                         URL: http://www.vitrum.cz/snail/
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