![Esp8266 Esp32 Power Supply Rechargeable Dual 16340 Lithium Battery Charger Shield Module Dual Output 3.3v 5v For Arduino R3 - Integrated Circuits - AliExpress Esp8266 Esp32 Power Supply Rechargeable Dual 16340 Lithium Battery Charger Shield Module Dual Output 3.3v 5v For Arduino R3 - Integrated Circuits - AliExpress](https://ae01.alicdn.com/kf/HTB1JmBkbQ9E3KVjSZFGq6A19XXaQ/ESP8266-ESP32-Power-Supply-Rechargeable-Dual-16340-Lithium-Battery-Charger-Shield-Module-Dual-Output-3-3V.jpg_Q90.jpg_.webp)
Esp8266 Esp32 Power Supply Rechargeable Dual 16340 Lithium Battery Charger Shield Module Dual Output 3.3v 5v For Arduino R3 - Integrated Circuits - AliExpress
![Designed a circuit to automatically switch the power supply from the two power sources (nothing designed to). | kohacraft's blog Designed a circuit to automatically switch the power supply from the two power sources (nothing designed to). | kohacraft's blog](https://kohacraft.com/wp/wp-content/uploads/65B9AA85-41DB-4712-97FE-350275DD93D7-1024x768.jpeg)
Designed a circuit to automatically switch the power supply from the two power sources (nothing designed to). | kohacraft's blog
![power supply - Arduino Esp32-dev powering with 9V battery connected to pins - Electrical Engineering Stack Exchange power supply - Arduino Esp32-dev powering with 9V battery connected to pins - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/59Yan.jpg)