Schematic — Esp32-cam-mb

--> Auto-reset circuit (Transistors + Capacitors) -> DTR/CTS signals -> RST & GPIO0

ESP32-CAM-MB is a specialized USB-to-serial programmer and power adapter board designed specifically for the AI-Thinker ESP32-CAM module. It simplifies development by providing a direct Micro USB interface, eliminating the need for complex wiring with external FTDI adapters or Arduino boards. Key Schematic Components esp32-cam-mb schematic

| MB Silkscreen | Connected to | Notes | | :--- | :--- | :--- | | 5V | USB VBUS (direct) | Beware: 5V output, not 3.3V! | | GND | Ground plane | | | 3V3 | Output of AMS1117 | Useful for low-power sensors | | IO4 | ESP32-CAM’s IO4 | Also used for SD card CS | | IO2 | ESP32-CAM’s IO2 | Boot-strapping pin | | IO12 | ESP32-CAM’s IO12 | | | IO13 | ESP32-CAM’s IO13 | | | IO14 | ESP32-CAM’s IO14 | | | IO15 | ESP32-CAM’s IO15 | | | | GND | Ground plane | |

: The AMS1117 is a linear regulator. When powering a Wi-Fi+streaming camera, the ESP32 can draw 200-300mA active. The 1117 will get warm but functions fine. : Onboard buttons to manually trigger a reset

: Onboard buttons to manually trigger a reset or force the board into bootloader mode if auto-flashing fails. Why Use the MB Adapter? ESP32-CAM-MB Micro USB Module - visha world