SD Card Module for Arduino (SPI, Full Size)

The SD Card Module lets your microcontroller read and write files on a standard full-size SD or SDHC card over a standard SPI interface. It's ideal for data logging, storing sensor readings, MP3 and audio playback, or saving configuration data in Arduino, ESP32 and other embedded projects.

The module can be powered from either 5V or 3.3V, making it easy to use with both 5V boards like the Arduino Uno and 3.3V boards like the ESP32. Card initialisation, reading and writing can all be handled with the standard SD library included in the Arduino IDE.

Using Micro SD cards instead? Check out our Micro SD Card Module.

Features

• Supports standard full-size SD and SDHC cards
• Selectable 5V or 3.3V power input
• Onboard 3.3V regulator for the 5V input
• All SPI pins broken out: MISO, MOSI, SCK and CS
• Mounting holes for secure installation
• Works with the built-in Arduino IDE SD library

Specifications

• Supply voltage: 5V or 3.3V (use one, not both)
• Interface: SPI
• Supported cards: SD, SDHC
• File systems: FAT16, FAT32
• Board size: 44mm x 34mm

Pinout

• GND: Ground
• 3.3V: 3.3V power input
• 5V: 5V power input
• MISO: SPI data out (card to microcontroller)
• MOSI: SPI data in (microcontroller to card)
• SCK: SPI clock
• CS: Chip select

Wiring to Arduino Uno / Nano

• GND: GND
• 5V: 5V
• MISO: D12
• MOSI: D11
• SCK: D13
• CS: D10 (any digital pin can be used, set it in your code)

On the Arduino Mega, use pins 50 (MISO), 51 (MOSI), 52 (SCK) and 53 (CS).

Wiring to ESP32

• GND: GND
• 3.3V: 3V3
• MISO: GPIO 19
• MOSI: GPIO 23
• SCK: GPIO 18
• CS: GPIO 5

These are the default VSPI pins used by the ESP32 SD library on most ESP32 DevKit boards.

Usage Notes

• Connect only one power pin. Use 5V for 5V boards and 3.3V for 3.3V boards.
• Format cards as FAT16 or FAT32 before use. Cards larger than 32GB usually ship as exFAT and will need reformatting.
• Keep SPI wires short for reliable communication at higher speeds.