I need to use an arduino to convert a bool 0V/open discrete input to a 28V/open input, I have no idea where to start. Any suggestions ?
Do I understand correctly that you need to convert a signal that is 0V/5V to a signal that is 28V/0V? If so, depending on load, a transistor of FET will do.
And an Arduino is not needed for that.
The load is 150kOhm for the 28V/open and 56kOhm for the 0V/open. I'm completely new to Arduino, it's for a project and I was given one.. A transistor would be enough to do this even with this type of load ? Thank you !
A voltage divider from 28V to 5V may be the simplest solution. If required the Arduino can invert the input signal orientation.
Yes, you need to give a proper description of your problem, what it is you want to connect to what, and why. 
What function would an Arduino have in this project? 
I suspect it's the other way around; 0/5V in, 28/0V out.
I take the "open" as a switch state with the other (closed) state connecting to the indicated voltage through the mentioned resistor.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.