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How to turn a kit into a working ROV.

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2.8 kit water leaking through db25

In a submersion test I observe water dripping in through the holes in the db25. The endplate pieces seem to be cemented correctly, and epoxy/superglue was used as directed. Can anything be done to prevent this?

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There turned out to be 2 problems, and the epoxy was one. There was no space in the access holes to add more, but I was able to put a generous amount into the hole where the wires enter the end cap assembly. Perhaps this was in the instruction step and I missed it.

The other problem was caused by an incomplete bond between piece 6 (the last piece, white) and piece 5. The first time I tried to cement it, I didn't realize that piece 5 was not white acrylic like piece 6, but simply had a white paper cover. Of course the seal did not hold and I later removed the paper and re-cemented. But this time a whole section adjacent to the wire entry hole did not seal, I could peal it back easily. Re-cemented again and fortunately this time it held.

Waterproof now!

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I would look for the leak to be seeping through a gap between the wire terminals. You may be able to reseal this area by more epoxy and using a syringe to get it where you want. If this fails, I would order another cable and try again, being more particular to get more epoxy deep down into the DB25. You may find that thinning the epoxy or going heavier on the superglue for the nooks and crannies will seal it up.

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