PinHub

Source-backed pinouts for dev boards, SBCs, and microcontrollers

/

Discovery facets

Platform

Category

Manufacturer38

Processor family92

Logic level

Power input

Form factor

Wireless

Connector

Interfaces18

Wireless capability

Documentation

Has in-app pin map

Adafruit ESP32-S3 FeatherPin map

Adafruit · Microcontroller

Feather-format ESP32-S3 with native USB, Wi-Fi, Bluetooth LE, battery charging, and STEMMA QT.

Processor: Espressif ESP32-S3
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: Feather

3 wiring cautions

Adafruit Feather M4 ExpressPin map

Adafruit · Microcontroller

Fast SAMD51 Feather with battery charging and QSPI flash, popular for CircuitPython and Arduino.

Processor: Microchip ATSAMD51J19 Arm Cortex-M4F
Logic: 3.3 V
Wireless: None listed
Connector: Feather

3 wiring cautions

Adafruit Feather nRF52840 ExpressPin map

Adafruit · Microcontroller

BLE Feather built around Nordic's nRF52840, with CircuitPython support and the Feather pinout.

Processor: Nordic nRF52840 Arm Cortex-M4F
Logic: 3.3 V
Wireless: Bluetooth · Thread
Connector: Feather

3 wiring cautions

Adafruit Feather RP2040Pin map

Adafruit · Microcontroller

Adafruit's Feather RP2040 with battery charging, STEMMA QT, and CircuitPython-friendly labels.

Processor: RP2040 dual-core Arm Cortex-M0+
Logic: 3.3 V
Wireless: None listed
Connector: Feather

2 wiring cautions

Adafruit Grand Central M4 ExpressPin map

Adafruit · Microcontroller

High-pin-count SAMD51 board in the Arduino Mega footprint, with CircuitPython support.

Processor: Microchip ATSAMD51P20 Arm Cortex-M4F
Logic: 3.3 V
Wireless: None listed
Connector: Board-specific

3 wiring cautions

Adafruit ItsyBitsy M4 ExpressPin map

Adafruit · Microcontroller

Small, fast SAMD51 board with QSPI flash for CircuitPython, a step up from M0 boards.

Processor: ATSAMD51G19 Cortex-M4F @ 120 MHz
Logic: 3.3 V
Wireless: None listed
Connector: Board-specific

3 wiring cautions

Adafruit ItsyBitsy RP2040Pin map

Adafruit · Microcontroller

Compact RP2040 stick board with more exposed pins than QT Py-style boards and CircuitPython.

Processor: RP2040 dual-core Arm Cortex-M0+
Logic: 3.3 V
Wireless: None listed
Connector: Board-specific

3 wiring cautions

Adafruit Metro ESP32-S3Pin map

Adafruit · Microcontroller

ESP32-S3 board in the Arduino-like Metro footprint, with STEMMA QT and room for CircuitPython.

Processor: ESP32-S3
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: Arduino shield

2 wiring cautions

Adafruit Metro M4 ExpressPin map

Adafruit · Microcontroller

SAMD51 board in the UNO shield footprint with far more performance and CircuitPython storage.

Processor: Microchip ATSAMD51J19 Arm Cortex-M4F
Logic: 3.3 V
Wireless: None listed
Connector: Arduino shield

3 wiring cautions

Adafruit QT Py ESP32-C3Pin map

Adafruit · Microcontroller

A small Wi-Fi and BLE RISC-V board in Adafruit's QT Py footprint for compact connected projects.

Processor: ESP32-C3 RISC-V
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: Board-specific

2 wiring cautions

Adafruit QT Py ESP32-S3Pin map

Adafruit · Microcontroller

Tiny ESP32-S3 board with STEMMA QT, popular for CircuitPython and compact Wi-Fi prototypes.

Processor: ESP32-S3
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: Board-specific

2 wiring cautions

Adafruit QT Py RP2040Pin map

Adafruit · Microcontroller

Tiny RP2040 board in the Seeed XIAO footprint with STEMMA QT, a NeoPixel, and CircuitPython support.

Processor: RP2040 dual-core Arm Cortex-M0+
Logic: 3.3 V
Wireless: None listed
Connector: XIAO

3 wiring cautions

Arduino DuePin map

Arduino · Microcontroller

Arduino's Arm-based Mega-format board, with many I/O pins, dual DAC outputs, and 3.3 V logic.

Processor: Microchip SAM3X8E Arm Cortex-M3
Logic: 3.3 V
Wireless: None listed
Connector: Board-specific

3 wiring cautions

Arduino GIGA R1 WiFiPin map

Arduino · Microcontroller

Mega-format Arduino with a dual-core STM32H7, Wi-Fi/BLE, USB host, and camera/display connectors.

Processor: STM32H747XI, M7 480 + M4 240 MHz
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: Board-specific

4 wiring cautions

Arduino LeonardoPin map

Arduino · Microcontroller

Native-USB ATmega32U4 Arduino with UNO-style headers but Leonardo-specific I2C and SPI placement.

Processor: Microchip ATmega32U4
Logic: 5 V
Wireless: None listed
Connector: Arduino shield

4 wiring cautions

Arduino Mega 2560 Rev3Pin map

Arduino · Microcontroller

Classic high-pin-count Arduino for robotics and shield projects that need many GPIOs or UARTs.

Processor: ATmega2560
Logic: 5 V
Wireless: None listed
Connector: Board-specific

2 wiring cautions

Arduino MicroPin map

Arduino · Microcontroller

Breadboard-friendly ATmega32U4 board with Leonardo-style native USB, developed with Adafruit.

Processor: Microchip ATmega32U4
Logic: 5 V
Wireless: None listed
Connector: Board-specific

4 wiring cautions

Arduino MKR WAN 1310Pin map

Arduino · Microcontroller

A low-power MKR board with LoRa connectivity for remote sensors and long-range telemetry prototypes.

Processor: SAMD21G18 + Murata LoRa module
Logic: 3.3 V
Wireless: None listed
Connector: MKR

3 wiring cautions

Arduino MKR WiFi 1010Pin map

Arduino · Microcontroller

A SAMD21-based IoT board with Wi-Fi, Bluetooth, crypto hardware, and the MKR shield ecosystem.

Processor: SAMD21 + u-blox NINA-W102
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: MKR

2 wiring cautions

Arduino MKR ZeroPin map

Arduino · Microcontroller

SAMD21 MKR board with microSD, aimed at compact audio, logging, and battery projects.

Processor: Microchip SAMD21G18
Logic: 3.3 V
Wireless: None listed
Connector: MKR

3 wiring cautions

Arduino NanoPin map

Arduino · Microcontroller

The classic breadboard-friendly Arduino: UNO compatibility in a compact package.

Processor: ATmega328P
Logic: 5 V
Wireless: None listed
Connector: Board-specific

2 wiring cautions

Arduino Nano 33 BLE SensePin map

Arduino · Microcontroller

Compact BLE Arduino with onboard sensors, a common pick for TinyML demos and embedded ML labs.

Processor: Nordic nRF52840
Logic: 3.3 V
Wireless: Bluetooth
Connector: Board-specific

2 wiring cautions

Arduino Nano 33 IoTPin map

Arduino · Microcontroller

Compact Nano-format SAMD21 board with Wi-Fi and Bluetooth for cloud-connected prototypes.

Processor: SAMD21G18 + u-blox NINA-W102
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: Board-specific

3 wiring cautions

Arduino Nano ESP32Pin map

Arduino · Microcontroller

Nano-format Arduino built on an ESP32-S3 module, with Wi-Fi, Bluetooth, and MicroPython support.

Processor: u-blox NORA-W106 / ESP32-S3
Logic: 3.3 V
Wireless: Wi-Fi · Bluetooth
Connector: Board-specific

2 wiring cautions

Loading source-backed pinouts…

PinHub

Source-backed pinouts for dev boards, SBCs, and microcontrollers

/

Discovery facets

Platform