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An arduino connected by pins to a surface of unknown metal. The pins are labeled "ground" and "battery input"

Hello! I'm very new to electrical engineering and I wanted to ask a question before I attempted something potentially dumb. One word answers are acceptable here! :) I'm eager to learn so any longer explanations are welcome too.

I need to connect this arduino to this slab of metal jewelry so that it's secure enough for me to plug and unplug a USB in without shearing the arduino off the jewelry. I was going to solder it directly on (and probably use a few more pins elsewhere to stabilize). I don't know what type of metal this surface this is, but I know it's non-magnetic (guessing it could be copper of some sort, though potentially it could also brass or bronze I think? I found this jewelry on the side of the road).

Anyway, I was wondering if this could potentially cause a problem - like a short-circuit. In the picture, I have a battery pack and an arduino connected by these 3 pins. The middle pin is the ground, and the right-side pin is the battery input (sending voltage from the battery pack into the arduino), and the left pin sends voltage from the arduino USB to the battery pack. All 3 would be soldered to the metal in this scenario (assuming the soldering goes well!).

Thanks for your help!

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    \$\begingroup\$ All metals are conductor. \$\endgroup\$ – user263983 Feb 25 at 0:43
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    \$\begingroup\$ not potentially a short circuit .... definitely a short circuit ... if you solder three pins to the same piece of metal, then that would be the same as twisting the three pins together and soldering them \$\endgroup\$ – jsotola Feb 25 at 1:53
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    \$\begingroup\$ Have you considered using 2 part epoxy glue? Should be able to get some for a dollar or two. \$\endgroup\$ – enhzflep Feb 25 at 2:54
  • \$\begingroup\$ epoxy glue! good idea - didn't think of that \$\endgroup\$ – Starcat Feb 25 at 5:00
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    \$\begingroup\$ If it's just a temporary job for a costume or something, electrical tape will give more than enough insulation for low voltages. If you use it right it will last quite a while. If it's more permanent other options would be better. \$\endgroup\$ – K H Feb 25 at 6:22
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My answer got deleted by a moderator so let me be clear - based on the comments - YES this CAN CAUSE A SHORT CIRCUIT.

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  • \$\begingroup\$ It probably got deleted because answers who simply say "yes" are considered very low quality. A good answer in this case would contain a solution too. \$\endgroup\$ – Lundin Feb 26 at 14:04

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