PCB v0.7 · 130 × 115 mm · TWO-LAYER FR4 1.6 mm · ESP32-S3-WROOM-1
This view is generated straight from the board project file (hardware/kicad/obd2-simulator.kicad_pcb), so it matches the real placement and the real tracks: 639 tracks on the top layer, 73 vias, 103 footprints. Yellow marks the power section: PD sink U1 (CH224K), step-down converter U2 (TPS562201), resettable fuse F1 and TVS diode D2, through which 12 V reaches pin 16 of connector J2 and powers the diagnostic tool. Blue marks the programming circuit: the BOOT (SW4) and RESET (SW5) buttons, pull-up R14, pull-down R15 on the USB-SEL line, capacitor C26 on the EN pin and the UART header J6. Hover a component for its description.