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Jump resistor with I/O ports
Posted: Tue Nov 26, 2013 3:25 pm
by Klipeti
Can I use 1ohm jump resistor with I/O ports or any other ports? I don't have 0ohm jump resistors.
Goal is to make clean looking circuit board, plain wire would look stupid in middle of other components.
Re: Jump resistor with I/O ports
Posted: Tue Nov 26, 2013 6:24 pm
by kersing
That depends on the load. If there is no significant load the voltage drop will be minimal and you're fine using 1 ohm.
Re: Jump resistor with I/O ports
Posted: Tue Nov 26, 2013 6:54 pm
by Klipeti
Ok thanks. I think that I just get 0ohm resistors -> better sure than sorry
Re: Jump resistor with I/O ports
Posted: Mon Dec 09, 2013 12:27 am
by Brendan
Just thought I'd mention that the limited output current of an I/O port renders effective source resistance typically around several tens of Ohms. This can be determined by the quoted output voltage drop versus output current for high and low conditions in the electrical characteristics of the device datasheet.
Consequently, an additional series resistance of 1-Ohm would have no bearing under any circumstances.
All the best,
Brendan