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Keep in mind that your batteries will likely perform worse after a handful of years, regardless of the number of times you recharge them

Then hook your red wire (vcc) to the 3.3V rail of the LaunchPad and black wire to SOURCE of the MOSFET

Unfortunately I think that most ideas here are going to be too expensive--once I get to about $20 or $30, it is probably not worth it

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Lightweight materials are ideal, but not at the cost of durability

Level up with the new NGXC Rod Series