PCB Design of an Sp02 module that includes an arduino nano, max30102 sensor, an ssd1306 OLED screen, some buttons and an LED, using KiCad. Here is the tutorial I followed (from schematic to gerber files): https://youtube.com/playlist?list=PLUOaI24LpvQPls1Ru_qECJrENwzD7XImd&si=hY47-fkTa5ZifyPR