tux-cube
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Quiescent current from the LED Pixel?
As I understand it those chips use 250uA or so when idle? Seems like a significant load in this kind of application.
Could a MOSFET be used to stop this idle drain?
This is true. It's my first ESP32 PCB design and I didn't focus on power efficency - but for a revision of the board I sure will take this into consideration. The sensor cube uses Bluetooth Low Energy and then the ESP32 uses quite a lot of power. For a 24/7 usage of the board the LED could also be soldered of or yes maybe a MOSFET.