I lost the power adapter to the module used to drive a LIDAR sensor I have. I am planning to make a new adapter but one problem I am running into is that I can't figure out if the module's PCB sources positive power from the center of the barrel jack or from the outer of the barrel jack.
What are some strategies I can use to figure out which the PCB uses?
Edit: thanks for the help everyone but I took the easy way out and emailed the manufacturer. I thought this would be a total shot in the dark but figured it was worth a try before I break something. To my surprise they actually wrote back and told me what was what.