I've got an old car DC-DC converter for a laptop, 12v in, 24 out. I've long since cut off the cables and was going to recycle it but now could use it.
The PCB is well-potted inside an extruded aluminum "tunnel" so access isn't practical. The cable stubs are identical so I can't identify which had a cigar-lighter (remember those?) plug and which had the barrel connector.
Using the diode test measurement (and swapping DMM probe polarity) on these two 2-wire cables, I get:
* 0.8v / 0.5v
* 0.6v / increasing to infinity
Is the one with 0.6v / infinity measuring the output rectifiers and filter caps?
How can I verify which is which?
Thanks.
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EDIT: "Just buy another" isn't an option. This is a project, a challenge. I have this and want to use it.