Loading source-backed pinouts…
Microcontroller
BBC micro:bit V2
A classroom-first board with sensors, buttons, display, radio, and an edge connector that makes hardware concepts approachable.
Processor
Nordic nRF52833
Logic
3.3 V edge connector
Power
Micro-USB, battery pack, 3 V edge
Format
25-pin classroom edge connector
Check before wiring
- Some pins are shared with onboard display, buttons, speaker, or NFC features.
- Edge connector accessories can obscure which signals are actually available.
Interfaces
GPIOI2CSPIUARTADCPWMBluetooth
Source-backed connector
Interactive pin map
Pin map
Connector
25-pad edge connector
Front side up, gold edge connector along the bottom
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
Hover, tap, or focus a pad to inspect a pin. Use arrow keys to move between pins.
- Pin numbers are micro:bit pad labels mapped to nRF52833 GPIO, per the official micro:bit edge connector pinout.
- Edge connector logic is 3.3 V; the 3V pads supply ~3.3 V and can also be used to power the board.
- Many pads are shared with the LED display, buttons, speaker, microphone, or internal I2C and must be freed before reuse.
All 21 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| Ring pads (banana/croc) | ||||
| 1 | ADC | P0.02 / AIN0 · GPIO, analog, touch, PWM. | ||
| 2 | ADC | P0.03 / AIN1 · GPIO, analog, touch, PWM. | ||
| 3 | ADC | P0.04 / AIN2 · GPIO, analog, touch, PWM. | ||
| 4 | Power | 3V | ~3.3 V supply ring. | |
| 5 | Ground | GND | ||
| Edge pins | ||||
| 5 | ADC | P0.31 / AIN7 · Shared with LED display column 3. | ||
| 6 | ADC | P0.28 / AIN4 · Shared with LED display column 1. | ||
| 7 | GPIO | P0.14 · Shared with Button A. | ||
| 8 | GPIO | P1.05 · Shared with LED display column 4. | ||
| 9 | GPIO | P0.11 · Shared with LED display column 2. | ||
| 10 | GPIO | P0.10 · NFC2 capable; NFC disabled by default. | ||
| 11 | GPIO | P0.09 · NFC1 capable; NFC disabled by default. | ||
| 12 | ADC | P0.30 / AIN6 · Shared with LED display column 5. | ||
| 13 | GPIO | P0.23 · Shared with Button B. | ||
| 14 | GPIO | P0.12 · Reserved for accessibility. | ||
| 15 | SPI | SPI | P0.17 / SCK | |
| 16 | SPI | SPI | P0.01 / MISO | |
| 17 | SPI | SPI | P0.13 / MOSI | |
| 18 | GPIO | P1.02 | ||
| 19 | I2C | I2C | P0.26 / SCL · Shared with internal I2C bus. | |
| 20 | I2C | I2C | P1.00 / SDA · Shared with internal I2C bus. | |
Why it matters
- Official developer docs document the V2 edge connector pinout.
- Widely used by students and teachers before moving to breadboard systems.
- Large pads support clips as well as edge connector accessories.
Keep exploring
Similar boards
Adafruit ESP32-S3 Feather
same microcontroller platform · both support Bluetooth
Adafruit Feather M4 Express
same microcontroller class · same microcontroller platform
Adafruit Feather nRF52840 Express
same microcontroller platform · both support Bluetooth
Adafruit Feather RP2040
same microcontroller class · same microcontroller platform