SD Card Module

The SD Card Reader Module is a compact and easy-to-use interface board designed to connect a standard SD card to microcontrollers like Arduino, STM32, or other ARM systems. The module breaks out all necessary SPI pins (MOSI, MISO, SCK, CS) and includes a built-in voltage regulator and level shifters, allowing safe operation with both 5V and 3.3V logic levels. You can read and write files on FAT16 or FAT32 formatted SD cards using simple library functions. The module features a spring-loaded push-push card slot and clearly labeled pins. Its small size (5.1cm x 3.1cm) makes it suitable for portable data loggers, audio players, and other embedded applications. Specifications Parameter Value Operating Voltage 5V or 3.3V (via onboard regulator) Interface SPI (MOSI, MISO, SCK, CS) Card Type Standard SD card (not micro SD, unless adapter used) Compatible Formats FAT16, FAT32 Pin Pitch 2.54mm (0.1 inch) Dimensions 5.1cm x 3.1cm (2.01in x 1.22in) Logic Level 5V tolerant with level shifters Mounting 4 mounting holes (2.5mm diameter) Applications Data logging for sensors (temperature, humidity, GPS) MP3 player audio file storage Configuration file storage for embedded systems Firmware update storage for MCU/ARM systems Text or CSV file logging for industrial monitoring Portable game consoles and handheld devices