Simple pwm SPEED control

Looking to set up a DC motor speed control with a 138 X 32 OLED 0 - 100% bar graph using a rotary encoder switch.



Arduino Beetle (Leonardo)

Rotary switch encoder; Push ON/OFF, rotate clockwise ti increase speed (counterclockwise to decrease). 4 inputs.

OLED, 138X32, SDL/SDA 4 outputs.

LED, Green, 2 output, HIGH when on...