Product Description

ESP32-WROOM Development Board

= Versatile Power Options for IoT and Embedded Projects =

This ESP32-WROOM development board features both a 3.3V input/output pin and a VIN power input pin, offering flexible powering options for different project needs.

Dual Power Input Options Supports both 3.3V regulated and 512V via VIN

Onboard Voltage Regulator - Converts VIN to stable 3.3V for the ESP32 module

VIN pin accepts 5V to 12V DC input (check board specs for exact range)

The 3.3V pin is primarily a regulated output, but can also accept regulated 3.3V input on some boards

For batterypowered projects, use VIN with 512V input and let the onboard regulator do the work

Do not apply voltage above 3.6V directly to the 3.3V pin unless the board specifically supports it

= Power Pin Specifications =

Pin	Function	Voltage	Use Case
VIN	Power Input	5-12V DC	Feeds onboard regulator, recommended for external power
3V3	Regulated Output / Input	3.3V	Powers peripherals OR regulated input (check board)
GND	Ground	-	Common reference for all circuits

The onboard AMS1117 voltage regulator converts the higher VIN voltage to the 3.3V required by the ESP32 module . This allows you to use common power sources like USB power banks, 9V batteries, or 12V adapters without additional voltage conversion circuitry .