7:16 ESP32 UART TUTORIAL AND BASIC DEMO - How to connect ESP32 to Arduino Uno Step by Step Circuit Desolator113K views
5:04 HOW TO USE LOGIC LEVEL SHIFTER ON ARDUINO TO CONVERT CIRCUITS AND SENSORS FROM 5V TO 3.3V CIRCUITS Circuit Desolator81K views
3:32 HOW TO CONVERT ARDUINO OPERATING VOLTAGE LEVEL FROM 5V TO 3.3V (Warning: 3.3V overclocked at 16Mhz) Circuit Desolator16K views