Hello everyone, first-time arduino user here.
I have this little project where I want an arduino to control an automatic burette that I use in the chemistry lab.
This burette is able to take inputs and send outputs through a d-sub cable.
The burette itself is powered, and does provide power(0-5VDC) to the outputs to send its data.
For this project I want to connect the arduino to the burette, as well as to the computer to save the results. (see diagram: (Burette isn't analog but digital, oopsie))
Problem is, both the burette and the usb cable provide power to the arduino.
How do I wire this without screwing up my computer, arduino or burette?
On a related note, the burette's manual mentions that the outputs are 'open collector' outputs. It may be of help, I have no idea how that works.
Edit: Here is some information on the burette's I/O port.