# CircuitBase — Full Pinout Reference & Machine Dataset Index

Complete catalog of published microcontroller development board pinouts, hardware specifications, and machine endpoints.

## Published Boards

### Arduino Mega 2560 Rev3
- Slug: arduino-mega-2560
- Family: Arduino
- Manufacturer: Arduino
- MCU: ATmega2560 (AVR)
- Clock Speed: 16 MHz
- Memory: 8 KB SRAM, 0.25 MB Flash
- Pins: 92
- Logic Voltage: 5.0 V
- Interactive Page: https://circuitbase.tech/pinout/arduino-mega-2560
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/arduino-mega-2560.json
- Primary Sources:
  - [Arduino Mega 2560 Rev3 Official Schematic](https://docs.arduino.cc/resources/schematics/A000067-schematics.pdf) (Arduino, schematic)
  - [Arduino Mega 2560 Rev3 Eagle CAD Reference Design](https://docs.arduino.cc/static/00ab83283ad8f7aae17832d0fe1b1d51/A000067-cad-files.zip) (Arduino, reference_manual)
  - [ATmega640/1280/1281/2560/2561 8-bit AVR Microcontroller Datasheet](https://ww1.microchip.com/downloads/en/devicedoc/atmel-2549-8-bit-avr-microcontroller-atmega640-1280-1281-2560-2561_datasheet.pdf) (Microchip / Atmel, datasheet)

### Arduino Pro Mini
- Slug: arduino-pro-mini
- Family: Arduino
- Manufacturer: SparkFun / Arduino
- MCU: ATmega328P (AVR)
- Clock Speed: 16 MHz
- Memory: 2 KB SRAM, 0.03125 MB Flash
- Pins: 34
- Logic Voltage: 5.0 V
- Interactive Page: https://circuitbase.tech/pinout/arduino-pro-mini
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/arduino-pro-mini.json
- Primary Sources:
  - [Arduino Pro Mini Documentation and Pinout Reference](https://docs.arduino.cc/retired/boards/arduino-pro-mini) (Arduino / SparkFun, user_guide)
  - [ATmega328P 8-bit AVR Microcontroller Datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf) (Microchip Technology, datasheet)
  - [Arduino Pro Mini 328 Schematic and Eagle Hardware Files](https://github.com/sparkfun/Arduino_Pro_Mini_328) (SparkFun Electronics, schematic)

### NodeMCU v2 Amica (ESP8266)
- Slug: nodemcu-v2-cp2102
- Family: ESP8266 Series
- Manufacturer: Amica / NodeMCU Team
- MCU: ESP8266EX (Xtensa)
- Clock Speed: 80 MHz
- Memory: 80 KB SRAM, 4 MB Flash
- Pins: 30
- Logic Voltage: 3.3 V
- Interactive Page: https://circuitbase.tech/pinout/nodemcu-v2-cp2102
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/nodemcu-v2-cp2102.json
- Primary Sources:
  - [NodeMCU DEVKIT V1.0 Schematic & Altium Design Reference](https://github.com/nodemcu/nodemcu-devkit-v1.0) (NodeMCU Team, schematic)
  - [ESP8266EX Datasheet](https://www.espressif.com/sites/default/files/documentation/0a-esp8266ex_datasheet_en.pdf) (Espressif Systems, datasheet)
  - [ESP-12E WiFi Module Specification](https://docs.ai-thinker.com/_media/esp8266/docs/esp-12e_product_specification_en.pdf) (AI-Thinker, datasheet)
  - [ESP8266 Boot Mode Selection (esptool documentation)](https://docs.espressif.com/projects/esptool/en/latest/esp8266/advanced-topics/boot-mode-selection.html) (Espressif Systems, application_note)

### Raspberry Pi 40-Pin GPIO Header
- Slug: raspberry-pi-gpio-40pin
- Family: Raspberry Pi
- Manufacturer: Raspberry Pi Ltd
- MCU: BCM2711 / BCM2712 / RP1 / BCM2837
- Clock Speed: 1500 MHz
- Memory: 4194304 KB SRAM, 0.5 MB Flash
- Pins: 40
- Logic Voltage: 3.3 V
- Interactive Page: https://circuitbase.tech/pinout/raspberry-pi-gpio-40pin
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/raspberry-pi-gpio-40pin.json
- Primary Sources:
  - [Raspberry Pi Hardware Documentation — GPIO and the 40-Pin Header](https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#gpio-and-the-40-pin-header) (Raspberry Pi Ltd, reference_manual)
  - [BCM2711 ARM Peripherals (Raspberry Pi 4B & Compute Module 4)](https://datasheets.raspberrypi.com/bcm2711/bcm2711-peripherals.pdf) (Raspberry Pi Ltd, datasheet)
  - [Raspberry Pi HAT+ / HAT Design Guide & EEPROM Specification](https://datasheets.raspberrypi.com/hat/hat-plus-specification.pdf) (Raspberry Pi Ltd, user_guide)

### Raspberry Pi Pico
- Slug: raspberry-pi-pico
- Family: Raspberry Pi
- Manufacturer: Raspberry Pi Ltd
- MCU: RP2040
- Clock Speed: 133 MHz
- Memory: 264 KB SRAM, 2 MB Flash
- Pins: 40
- Logic Voltage: 3.3 V
- Interactive Page: https://circuitbase.tech/pinout/raspberry-pi-pico
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/raspberry-pi-pico.json
- Primary Sources:
  - [Raspberry Pi Pico Datasheet](https://datasheets.raspberrypi.com/pico/pico-datasheet.pdf) (Raspberry Pi Ltd, datasheet)
  - [RP2040 Datasheet](https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf) (Raspberry Pi Ltd, datasheet)

### STM32F103C8T6 Blue Pill
- Slug: stm32f103c8t6-blue-pill
- Family: STM32 Series
- Manufacturer: STMicroelectronics / Open Source
- MCU: STM32F103C8T6 (ARMv7-M)
- Clock Speed: 72 MHz
- Memory: 20 KB SRAM, 0.0625 MB Flash
- Pins: 44
- Logic Voltage: 3.3 V
- Interactive Page: https://circuitbase.tech/pinout/stm32f103c8t6-blue-pill
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/stm32f103c8t6-blue-pill.json
- Primary Sources:
  - [STM32F103x8 STM32F103xB Medium-density performance line ARM-based 32-bit MCU Datasheet](https://www.st.com/resource/en/datasheet/stm32f103c8.pdf) (STMicroelectronics, datasheet)
  - [RM0008 Reference Manual: STM32F101xx, STM32F102xx, STM32F103xx advanced ARM-based 32-bit MCUs](https://www.st.com/resource/en/reference_manual/cd00171190.pdf) (STMicroelectronics, reference_manual)
  - [STM32 Blue Pill (STM32F103C8T6 Minimum System Development Board) Schematic & Hardware Architecture](https://stm32-base.org/boards/STM32F103C8T6-Blue-Pill.html) (STM32-Base / Open Hardware, schematic)

### STM32F411CEU6 Black Pill
- Slug: stm32f411ceu6-black-pill
- Family: STM32 Series
- Manufacturer: WeAct Studio / Open Source
- MCU: STM32F411CEU6 (ARMv7E-M)
- Clock Speed: 100 MHz
- Memory: 128 KB SRAM, 0.5 MB Flash
- Pins: 44
- Logic Voltage: 3.3 V
- Interactive Page: https://circuitbase.tech/pinout/stm32f411ceu6-black-pill
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/stm32f411ceu6-black-pill.json
- Primary Sources:
  - [STM32F411xC STM32F411xE Arm Cortex-M4 32-bit MCU+FPU Datasheet](https://www.st.com/resource/en/datasheet/stm32f411ce.pdf) (STMicroelectronics, datasheet)
  - [RM0383 Reference Manual: STM32F411xC/E advanced Arm-based 32-bit MCUs](https://www.st.com/resource/en/reference_manual/rm0383-stm32f411xce-advanced-armbased-32bit-mcus-stmicroelectronics.pdf) (STMicroelectronics, reference_manual)
  - [WeAct Studio MiniF4x1 (STM32F411CEU6 Black Pill V3.1 / V2.0) Hardware Schematic & Architecture](https://github.com/WeActStudio/WeActStudio.MiniF4x1) (WeAct Studio, schematic)
  - [WeAct Studio Black Pill V2.0 Mechanical CAD Dimensions Drawing](https://github.com/WeActStudio/WeActStudio.MiniF4x1) (WeAct Studio, user_guide)

### Wemos D1 Mini v3.0 (ESP8266)
- Slug: wemos-d1-mini-v3
- Family: ESP8266 Series
- Manufacturer: LOLIN / Wemos
- MCU: ESP8266EX (Xtensa)
- Clock Speed: 80 MHz
- Memory: 80 KB SRAM, 4 MB Flash
- Pins: 16
- Logic Voltage: 3.3 V
- Interactive Page: https://circuitbase.tech/pinout/wemos-d1-mini-v3
- Machine Dataset: https://circuitbase.tech/data/v1/pinouts/wemos-d1-mini-v3.json
- Primary Sources:
  - [D1 Mini V3.0.0 Schematic and Hardware Design](https://www.wemos.cc/en/latest/d1/d1_mini.html) (WEMOS / Lolin, schematic)
  - [ESP8266EX Datasheet](https://www.espressif.com/sites/default/files/documentation/0a-esp8266ex_datasheet_en.pdf) (Espressif Systems, datasheet)
  - [ESP-12F WiFi Module Specification and Hardware Manual](https://docs.ai-thinker.com/_media/esp8266/docs/esp-12f_product_specification_en.pdf) (Ai-Thinker, datasheet)
  - [ESP8266 Boot Mode Selection (esptool documentation)](https://docs.espressif.com/projects/esptool/en/latest/esp8266/advanced-topics/boot-mode-selection.html) (Espressif Systems, application_note)

## Connector Catalog

- [Standard ARM 20-Pin JTAG Header](https://circuitbase.tech/connector/arm-jtag-20): Arm JTAG 20 (IEEE 1149.1 / SWD); 20 positions; machine JSON: https://circuitbase.tech/data/v1/connectors/arm-jtag-20.json
- [ARM Cortex 10-Pin SWD Header](https://circuitbase.tech/connector/cortex-debug-10): ARM CoreSight 10-pin; 10 positions; machine JSON: https://circuitbase.tech/data/v1/connectors/cortex-debug-10.json
- [DE-9 / DB-9 RS-232 Serial Port](https://circuitbase.tech/connector/db9-rs232): TIA/EIA-232 (DE-9, DTE); 9 positions; machine JSON: https://circuitbase.tech/data/v1/connectors/db9-rs232.json
- [RJ45 8P8C Ethernet Connector](https://circuitbase.tech/connector/rj45-ethernet): TIA-568 (T568A / T568B); 8 positions; machine JSON: https://circuitbase.tech/data/v1/connectors/rj45-ethernet.json
- [USB 2.0 Standard-A Connector](https://circuitbase.tech/connector/usb-a-standard): USB 2.0 (USB-IF); 4 positions; machine JSON: https://circuitbase.tech/data/v1/connectors/usb-a-standard.json
- [USB Type-C Receptacle](https://circuitbase.tech/connector/usb-c-receptacle): USB Type-C R2.5 (USB-IF); 24 positions; machine JSON: https://circuitbase.tech/data/v1/connectors/usb-c-receptacle.json