Micro SD Card Module Read and Write
Micro SD Card Module Read and Write
Micro SD Card Module Read and Write
Micro SD Card Module Read and Write

Micro SD Card Module Read and Write

Modules
DET631
Part.No: AA115
€2.50
In Stock
Immediate Dispatch
Micro SD Card Module for reading and writing Micro SD and SDHC cards via SPI interface. Supports 5V and 3.3V logic levels with onboard LDO regulator and level conversion circuit. 6-pin interface (GND, VCC, MISO, MOSI, SCK, CS).

 

The Micro SD Card Module (Mini TF Card Read and Write) is a compact storage interface module that enables microcontrollers to read from and write to Micro SD and Micro SDHC cards using the standard SPI communication protocol. With onboard 3.3V LDO regulation and a bidirectional level conversion circuit, it accepts both 5V and 3.3V logic, making it universally compatible with the most popular development platforms including Arduino and ESP32.

Key Features

  • Micro SD & SDHC Support: Compatible with standard Micro SD cards and high-speed Micro SDHC cards → flexible storage options for datalogging and file storage projects
  • Dual Voltage Logic (5V / 3.3V): Onboard level conversion circuit accepts both 5V and 3.3V signals → works with Arduino UNO/Nano (5V) and ESP32/Raspberry Pi (3.3V) without extra components
  • Standard SPI Interface: Communicates via MISO, MOSI, SCK, and CS pins → supported natively by virtually all Arduino and ESP libraries
  • Onboard 3.3V LDO Regulator: Generates a stable 3.3V supply for the SD card from the VCC input → no external power regulation needed
  • 6-Pin Connector: Clean, minimal pinout (GND, VCC, MISO, MOSI, SCK, CS) → easy to wire and breadboard-friendly

Pinout & Wiring

PINSymbolDescription
1GNDGround – connect to system ground
2VCCPower supply – 5V or 3.3V
3MISOSPI Master In Slave Out – data from SD card to MCU
4MOSISPI Master Out Slave In – data from MCU to SD card
5SCKSPI Clock signal
6CSChip Select – active low, selects the SD card

Wiring note: Connect MISO, MOSI, and SCK to the hardware SPI pins of your microcontroller. CS can be assigned to any available digital output pin defined in your sketch.

Compatibility

  • Arduino UNO / Nano (5V): Connect VCC to 5V; the onboard LDO and level shifter handle the rest. Use the standard SD.h library.
  • ESP32 / ESP8266 (3.3V): Connect VCC to 3.3V; level conversion circuit ensures safe 3.3V signal communication.
  • Raspberry Pi (3.3V): Compatible via SPI GPIO; use appropriate SD card Python or C libraries.

Typical Applications

  • Data logging: Record sensor readings (temperature, humidity, GPS) to a Micro SD card for long-term storage in IoT and field projects.
  • Audio/sound playback: Store and retrieve WAV or audio files for Arduino-based sound modules and voice response systems.
  • Configuration file storage: Save and load device settings or calibration data on embedded systems without re-flashing firmware.
  • Image & file storage: Buffer images from camera modules or store files in ESP32-based web servers and displays.
  • Educational projects: Ideal for students learning SPI communication, file systems (FAT32), and embedded data storage concepts.

Technical Specifications

ParameterValue
Communication InterfaceSPI (MISO, MOSI, SCK, CS)
Supported Voltage (VCC)5V or 3.3V
Onboard RegulatorLDO – 3.3V output for SD card supply
Level ConversionBidirectional level shifter included
Supported Card TypesMicro SD, Micro SDHC (high-speed)
Number of Pins6 (GND, VCC, MISO, MOSI, SCK, CS)

FAQ

Q: Do I need any additional components to use this module with Arduino UNO?
A: No. The onboard LDO regulator and level conversion circuit handle all voltage translation internally. Simply connect the 6 pins directly to your Arduino's 5V, GND, and SPI pins.

Q: What file system format should the Micro SD card use?
A: Most Arduino and ESP libraries (SD.h, SdFat) require the card to be formatted as FAT16 or FAT32. Format the card using your operating system or a tool like SD Card Formatter before use.

Package Contents: 1 × Micro SD Card Module (6-pin)

⚠ Note: Micro SD card is not included. Ensure the card is formatted as FAT32 before use. Do not hot-swap the SD card while the module is powered.
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