I want to control a High Torque Servo using the esp8266 with PWM. This servo's operation voltage is in the range: 4.8V - 7.2V. With the esp8266, the GPIO pins can only output a maximum 3.3v. What's the most simple way to achieve the 5v output from esp8266?
Can use a level shifter, they are easy to use and are cheaply available. These small chips are very handy and are bi directional, you share it both power supplies, for any 3.3v LV1-4 get corresponding 5v from hv1-4