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Automation, sensing and robotics • Help with parts for charging dock?

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So I have a yahboom tank that I made to work, runs on a raspberry pi and has a camera and moves. I want to make a charging dock. Does anyone know of a small conductive contact that is retractable which I could use for the base, that are capable of the power output of charging a 7.4v battery?
Like a piece of copper or zinc or whatever that is in another tube with a spring that can conduct electricity which has some manner of mount preferably and way of connecting a wire.
I think I can use two to four of those and two to four pieces of copper i got from heating and bending copper tube after cleaning it thoroughly on the bottom of the vehicle to make contact with them and make a little like plexiglass house that's he size of the tank and tapers in the from and back to make it easier to drive right in. And with four separate contacts inl figure at least two will make contact to deliver power. I just need to find a better battery pack with two larger lithium cells and a built in BMS unit since it's being left unattended.

Also is there a BMS that has a separate set of connectors that only allows for charging and not discharging? I ask because having a full 7.4v ready to zap anything metal on the floor is a recipe for problems and having a set of connectors that allow charging but not discharging would be useful.
If not would a set of diodes work? One on positive one on negative?

Statistics: Posted by jatgm1 — Sat May 10, 2025 11:52 am — Replies 0 — Views 65



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