Resistance test of alligator clips cables I bought versus one I made for a DIY electronics project
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- Опубликовано: 27 авг 2024
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#resistance #electronics #cable 
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I had the same problem with those chinese alligator clips, I did my own alligators clips like you.
Unfortunately the accuracy of low resistance measurement with a multimeter is very poor. On my BM235 the accuracy isn't even specified < 600 Ohms. To get accurate readings, use an LCR meter or do a Kelvin measurement with a constant current supply.
I do have an LCR meter. So, I'll keep that in mind!
How about using 2 of those cheap cables in parallel? It is like having 2 resistors in parallel. The resistance will decrease.
If I had to use them, I'd definitely parallel them for that very reason. They're bad enough where I'll never use them though.
I solder the wire to the clip myself. :) Crimping is probably better however, for a number of reasons including providing a better connection.
Nice :) I mostly just heard that crimping is better for vibrations.
A proper crimp is AIR TITE. :)
Gator clips today are total shit. The jaws don't align and the boot is slippery from the molding process and they don't clean off the anti-seize from them. The wire gauge is toooo thin and the crimps are crap. I pulled all of my last ones I got apart and changed the wire and soldered them all up then de-greased the boots in alcohol..
Yeah, the quality is very disappointing, but not surprising because I didn't pay much for these. Would be nice if they came with a quality rating or something.
Adafruit do a few different sets of alligator clip cables with 22AWG wire, less flexable but much more copper.
Measures as 0.3 ohm, still crimped rather than soldered.
Search their site for "alligator" as few different versions.
Nice :) I just bought some cheap ones. Didn't think they could be this bad lol.
I wonder if they are really copper and not copper clad aluminum (or worse - did you try taking a magnet to them to check for iron content?). Also, if you can measure 0.3 ohms you should compare with copper cable reference tables for this gauge and number of strands to see if it is too high.
@@SteelBlueVision I did not test them, I just pulled them out of a kit that I have without giving it much thought other than the resistance. Those are good tips, thanks!