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(Just to illustrate what Majenko is saying.) This is the inside of a breadboard: All your connections are on one side of that; you've tied everything to a single point.


I am a bit confused you state: VIN output, that is the voltage input to the onboard regulator. For the power supply use one of the same voltage but capable of more current. Current is the maximum a power supply will give reliably. Current is the current needed by a load so if the load is less then the source and the voltages are the same it is a go. The ...

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