The developers behind UnexpectedMaker have filled every nook on this board, packing a massive 700mA 3.3V regulator, onboard battery management, an RGB LED, 4MB of extra PSRAM, and 14 GPIO!
TinyPICO is tuned for ultra-low current use, dropping as low as 20uA when in deep sleep.
Optimized power path and power management: TinyPICO has been designed with two isolated power paths: a 5V path and a 3.3V path. Any components that are not needed for operation via battery or via the 3.3 V power pin are isolated within the 5V power path and are totally shut down when no USB cable is plugged in. In fact, even the power & charge LEDs are shut down when no 5 V power source is present.
Deep sleep has been optimized for all development platforms, and though they have seen it go as low as 10 uA, their official current rating in deep sleep is 20 uA.
TinyPICO includes an onboard APA102 RGB LED that has a quiescent current of 1 mA. Thankfully there is a solution for deep sleep. GPIO13 controls the power to the APA102 using a P-Channel MOSFET via a high-side switch that can (along with smoother IO settings) shut down the power to the APA102 for you. It’s essential to do this before going into deep sleep to ensure the lowest current draw possible.
UM has created some helper functions for you in their TinyPICO MicroPython & Arduino helper libraries to make this easy. Please check the code in the platform you use to understand how to shut down the APA102 correctly as just pulling GPIO13 high is not enough.
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