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For Joerg --> voltage divider and arduino

Hi Joerg.

I have some strange problem with my setup ( Arduino --> Raspberry ). The system is working perfect but after minute or two, i get HIGH state on RSP pin, but nothing wasn't sent from arduino. I get this states all the time and i can not stop them. They are activated at random cycles.

The funny part is that i can not detect any voltage change ( when this error starts ) and according to the datasheet, voltage from 2.8 - 3.3 is defined as HIGH state.

So, is it possible that RSP is picking some fast impulse from arduino's voltage divider ?

GM

Reply to
gm
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open CMOS input?

Reply to
makolber

open CMOS input? maybe... Good idea.

Reply to
gm

Yes, I don't know what you mean with RSP pin but if a pin is defined as input and nothing connected to it that pin will float around in level. You'd need to at least give it a pull-up or pull-down resistor.

--
Regards, Joerg 

http://www.analogconsultants.com/
Reply to
Joerg

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