Pic Input Leads - Electronic Circuits Projects Diagrams Free

richard.c · 19th January 2008, 11:14 AM

Hi All,

I am using various analogue and digital Pic inputs, such as switches, ntc sensors etc; some on leads up to 2 meters long.
I’ve been using twin cored screened cable, with the cores to Pic signal input and 0v dc., and the screen to a totally separate Earth point.
Many commercial sensors I see, come supplied with coaxial cable and a Bnc plug, that connect to the signal input and 0v dc.

What I would like to know is which cabling method, if any, is the better way ?

Also, in both cases, but particularly when using the coaxial leads, should Earth be connected to the 0v dc of the Pic supply ?

Thanks

Richard

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19th January 2008, 11:14 AM	#1
richard.c	Pic Input Leads Hi All, I am using various analogue and digital Pic inputs, such as switches, ntc sensors etc; some on leads up to 2 meters long. I’ve been using twin cored screened cable, with the cores to Pic signal input and 0v dc., and the screen to a totally separate Earth point. Many commercial sensors I see, come supplied with coaxial cable and a Bnc plug, that connect to the signal input and 0v dc. What I would like to know is which cabling method, if any, is the better way ? Also, in both cases, but particularly when using the coaxial leads, should Earth be connected to the 0v dc of the Pic supply ? Thanks Richard