情境
A compact ESP32-based wearable fitness tracker powered by a single-cell LiPo battery, using a 3.3V LDO for the MCU and sensors, and sharing an I2C bus for the heart rate sensor and OLED display.
這張圖裡有什麼
看懂背後的決策。
01
Use a 3.3V LDO to power the ESP32 and peripherals from the LiPo battery
02
Connect heart rate sensor and OLED on the same I2C bus with pull-up resistors
03
Add a reset pushbutton with pull-up and a battery voltage divider for ADC monitoring
Use this structure for battery-powered ESP32 wearables, environmental monitors, or any compact IoT device needing I2C sensors, a display, and a stable 3.3V rail.