石榴姐

py32f002 USB power

Overview

The maximum voltage of ldo is 35V, it is better not to exceed 30V.
Tested with Xiaomi charger, it is about 50 degrees at 9V 7.4A 67W, which is acceptable (using 1 milliohm sampling resistor).
There is a built-in button (external interrupt button, falling edge trigger).
Each time you press it, WS2812 switches the color (red, yellow, green, cyan, blue, purple, white, black (off)).
Press and hold for 2 seconds to clear the flow and turn off the ws2812.

There is a built-in LED light and
a built-in WS2812B light, which share a GPIO with the LED.

The oled and ina226 use an i2c bus.

Design Files

Related Devices

Devices	Class	introduce	Datasheet
GRM188R61H225KE11D	Passive components;The patch capacitance	Accuracy: ±10% Capacitance: 2.2uF Rated voltage: 50V Temperature drift coefficient (dielectric material): X5R Material: X5R	Download
WS2812B-2020			Download
78L05	Power/power management;Linear regulator chip	Output type: fixed Maximum input voltage: 30V Output current: 100mA Output voltage (minimum/fixed value): 5V	Download
INA226AIDGSR	Power/power management;The power supply circuit		Download
U231-091N-4BLRA00-S-1	The connector;The USB connector	Male and Female: Female Connector Type: USB - Type A Number of Contacts: 5 Standard: USB 3.1	Download

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