SunFounder 3in1 Kit - Page 13

SunFounder 3in1 Kit
1.2.1 ESP8266 Adapter
The ESP8266 adapter is an expansion board that allows the ESP8266 module to be used on a breadboard.
It perfectly matches the pins of the ESP8266 itself, and also adds a 5V pin to receive the voltage from the Arduino
board. The integrated AMS1117 chip is used to drive the ESP8266 module after dropping the voltage to 3.3V.
The schematic diagram is as follows:
Example
1.2. ESP8266 Module 9