MicroSD Card Reader SPI Module for Arduino
MicroSD Card Reader Module – SPI Interface, 3.3V/5V Logic
The MicroSD Module is a compact breakout board that allows microcontrollers to read and write data to microSD cards over the SPI protocol. It is commonly used for data logging, audio playback, image storage, and configuration file management in embedded projects. With on-board level shifting, it safely interfaces with both 3.3V and 5V systems, making it versatile for a wide range of development boards.
Key Specifications
| Specification | Value |
|---|---|
| Interface | SPI (Serial Peripheral Interface) |
| Operating Voltage | 3.3V / 5V (with on-board regulator) |
| Logic Level | 3.3V (5V tolerant via level shifter) |
| Supported Card Type | MicroSD, MicroSDHC (up to 32GB typical) |
| Dimensions | 42mm x 24mm x 5mm |
| Pin Header | Standard 0.1" spacing (6 pins: VCC, GND, MISO, MOSI, SCK, CS) |
What You Can Build With This
- Temperature and humidity data logger with timestamp
- Arduino or ESP32-based MP3 player
- Digital photo frame displaying images from SD card
- Configuration file storage for IoT devices
Compatibility
This module works with any microcontroller that supports SPI, including Arduino Uno, Mega, Nano, ESP8266, ESP32, and STM32. When used with 5V boards, the on-board 3.3V regulator and level shifter protect the microSD card. For 3.3V boards like Raspberry Pi Pico or ESP32, you can power the module directly from 3.3V and bypass the regulator. Note that some full-size Raspberry Pi models have a native SD card slot and may not need this module.
Wiring Notes
Connect VCC to 5V (or 3.3V if available), GND to common ground, and SPI pins: CS to any digital pin (often D10 on Arduino), MOSI to D11, MISO to D12, SCK to D13. Use a 10kΩ pull-up resistor on the CS line if the microcontroller does not have built-in pull-ups. Ensure the microSD card is formatted as FAT16 or FAT32 for compatibility with common libraries like SD.h.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, it works perfectly with Arduino Uno. Use the standard SPI pins (11, 12, 13) and set CS to pin 10. The module’s 5V tolerance ensures safe operation.
What is the maximum microSD card capacity supported?
Most modules support microSD and microSDHC cards up to 32GB. Cards larger than 32GB (SDXC) may require exFAT formatting and are not guaranteed to work with standard Arduino libraries.
Do I need to format the microSD card before use?
Yes, format the card as FAT16 or FAT32. The built-in SD library on Arduino expects FAT file systems. Avoid NTFS or exFAT unless your code supports them.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items