Generic Micro SD Card Reader Module | SPI Interface | Data Logging & Storage for Microcontrollers
₹149.00₹250.00 (price_including_tax) (-40%)
Empower your embedded projects with reliable data storage capabilities. This module transforms simple microcontrollers into powerful data logging or media playback systems. Experience consistent performance and straightforward integration into any DIY or professional setup.
Seamlessly integrate robust data storage with microcontrollers using this high-performance Micro SD Card reader module.
Easily add persistent memory to projects for logging sensors and expanding system capabilities.
Works effortlessly with both 3.3V and 5V logic systems like Arduino and ESP32.
Standard SPI interface and clear pin labeling ensure quick and error-free setup.
The Engineering Behind Micro SD Card Reader Module
The Micro SD Card Reader Module serves as a fundamental interface for integrating non-volatile memory into embedded systems. It facilitates communication between a microcontroller and a standard Micro SD card, primarily utilizing the Serial Peripheral Interface (SPI) protocol. This architecture enables efficient data transfer for diverse applications, from environmental data logging to storing configuration files or multimedia assets, making it an indispensable component for expanding system capabilities.
Constructed on a compact, robust PCB, this module is engineered for durability and ease of integration. Its design incorporates essential voltage regulation and level shifting circuitry, ensuring reliable operation across common microcontroller voltage domains (3.3V and 5V). This pedagogical value is immense, providing a practical platform for engineers and makers to understand file system management and external memory interfacing in real-world applications.
High-Performance SPI Communication Protocol
At its core, the module leverages the SPI protocol for synchronous data exchange with the Micro SD card. SPI is renowned for its speed, simplicity, and efficiency, requiring only four essential lines (MISO, MOSI, SCK, CS). This allows microcontrollers to rapidly read from and write to the SD card, critical for time-sensitive data acquisition or high-throughput storage tasks without excessive CPU overhead.
Integrated Voltage Level Shifting & Power Regulation
A significant engineering advantage of this module is its onboard voltage level shifting and stable 3.3V power regulation. Micro SD cards operate strictly at 3.3V, while many popular microcontrollers (like Arduino Uno) run on 5V logic. The integrated level shifters automatically convert logic signals, resolving potential hardware incompatibilities and eliminating the need for external voltage converters. The stable 3.3V regulator ensures the SD card receives clean, consistent power, preventing data corruption and enhancing overall system reliability, a common pain point in mixed-voltage designs.
Optimized for Performance & Integration
- Input Operating Voltage: 4.5V to 5.5V DC
- Logic Voltage Compatibility: 3.3V and 5V with onboard level shifters
- Communication Interface: SPI (Serial Peripheral Interface)
- Supported Card Types: Micro SD, Micro SDHC, Micro SDXC cards
- Pin Configuration: VCC, GND, MISO, MOSI, SCK, CS (Chip Select)
- Onboard Regulator: AMS1117 3.3V for SD card power
- Current Consumption: ~20mA (Idle) to ~200mA (Peak Write)
Features & Benefits
- SPI Communication Protocol: Ensures high-speed, reliable data transfer with minimal pin count, optimizing microcontroller resource usage.
- 3.3V/5V Logic Compatibility: Integrated level shifters allow seamless integration with various microcontrollers without external components, simplifying designs.
- Compact Form Factor: Designed for space-constrained projects, fitting easily into custom enclosures and tight PCB layouts.
- Wide SD Card Support: Compatible with Micro SD, Micro SDHC, and Micro SDXC cards, offering flexible storage capacities.
- Simple Pinout: Standard VCC, GND, MISO, MOSI, SCK, CS pins ensure straightforward wiring and quick setup with development boards.
- Onboard Power LED: Provides immediate visual feedback for module operation status, aiding in debugging and system diagnostics.
Pro-Grade Advantages
- Effortless integration with common microcontrollers via SPI.
- Onboard level shifting ensures compatibility with both 3.3V and 5V logic.
- Compact design minimizes footprint, ideal for space-constrained applications.
- Robust support for various Micro SD card capacities (SD, SDHC, SDXC).
Technical Considerations
- Requires a dedicated SPI library on the microcontroller for file system management.
- Power consumption can increase significantly during write operations, requiring stable supply.
What is the primary communication interface for the Micro SD Card Reader Module?
The module primarily utilizes the Serial Peripheral Interface (SPI) protocol for communicating with microcontrollers, offering fast and efficient data transfer.
What voltage levels does this module support for logic signals?
Thanks to its integrated level shifters, the module is compatible with both 3.3V and 5V logic systems, allowing seamless integration with a wide range of microcontrollers.
What types of SD cards are compatible with this module?
This module supports Micro SD, Micro SDHC (High Capacity), and Micro SDXC (eXtended Capacity) cards, providing flexibility for various storage needs.
Is a voltage regulator integrated onto the module?
Yes, the module typically includes an AMS1117 3.3V regulator to provide stable and clean power to the Micro SD card, which operates at 3.3V.
Can this module be used for real-time data logging applications?
Absolutely. Its high-speed SPI interface and robust file system support make it an excellent choice for real-time data logging from sensors and other peripherals.
What are the essential pins required to interface this module?
The essential pins are VCC (power), GND (ground), MISO (Master In Slave Out), MOSI (Master Out Slave In), SCK (Serial Clock), and CS (Chip Select).
| Specification | Value |
|---|---|
| Input Operating Voltage | 4.5V – 5.5V DC |
| Logic Voltage Compatibility | 3.3V / 5V (with level shifter) |
| Communication Protocol | SPI |
| Supported Card Formats | Micro SD, Micro SDHC, Micro SDXC |
| Onboard Voltage Regulator | AMS1117 3.3V |
| Typical Idle Current | ~20mA |
| Peak Write Current | ~200mA |
| Number of Mounting Holes | 2 |
| Pinout | VCC, GND, MISO, MOSI, SCK, CS |
Additional information
| Technology | MicroSD Card Interface |
|---|---|
| Control Interface | SPI |
| Operating Voltage | 4.5V – 5.5V (Power Input) |
| Sensor Type | Data Storage Module |
| Difficulty Level | Intermediate |
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