情境
An IoT device with ESP32 needs to monitor battery voltage while minimising power consumption in deep sleep. An external ADC provides higher accuracy and an RTC timestamps readings.
這張圖裡有什麼
看懂背後的決策。
01
Using external ADS1115 ADC for better resolution and I2C interface
02
Low‑side NMOS to disconnect voltage divider when GPIO low during deep sleep
03
LDO regulator to derive 3.3 V from battery
Suitable for any battery‑powered ESP32 project requiring accurate battery monitoring and data logging with RTC.