I am planning a battery-operated project using the XIAO Seeed BLE Sense as the MCU and 19 NeoPixels. Here is a picture of my proposed wiring.
My question is if the Negative Battery ‘pin’ is the same as the ground (GND) pin? Or are they different somehow? And what about when you plug in the USB to recharge the battery? Is the USB ground the same as the Battery (-) the same as the GND?
And in my schematic, do I need to run a wire from the GND pin to the LEDs GND as well as the Battery (-)? Or do I only need one of them? Does it matter which?