Description Boardoza MicroSD Card Adapter is a compact breakout board that enables microSD card interfacing through the SPI communication protocol. The board integrates voltage regulation to convert 5V input to 3.3V operation, helping provide safe and reliable communication with microSD cards while maintaining compatibility with both 3.3V and 5V microcontroller systems. Features MicroSD card interface via SPI communication protocol Integrated voltage regulation from 5V input to 3.3V operation 3.3V tolerant SPI pins for microSD card protection Supports high-speed data read/write operations Compatible with microSD and microSDHC cards up to 32GB Standard SPI pinout for easy integration Compact 20mm x 40mm board size Specifications Specification Parameter Input Voltage 5V Voltage Input Type 6-pin 2.50mm header Operating Voltage 3.3V regulated Interface SPI, Serial Peripheral Interface Functions MicroSD card reader / writer module I/O Voltage Level 3.3V tolerant Supported Cards MicroSD, MicroSDHC up to 32GB Operating Temperature -40°C ~ +85°C Board Dimensions 20mm x 40mm Dimensions Interface Pin Number Pin Name Description 1 MISO Master Input Slave Output, 3.3V tolerant 2 SCK Serial Clock, 3.3V tolerant 3 MOSI Master Output Slave Input, 3.3V tolerant 4 CS Chip Select, 3.3V tolerant 5 GND Ground, 0V reference 6 +5V Positive voltage input Applications Embedded data logging projects IoT devices requiring local storage Arduino, ESP32, STM32, and other SPI-based platforms Microcontroller projects requiring removable memory Product List Quantity Item 1 Boardoza MicroSD Card Adapter Resources Official GitHub Repository MicroSD Breakout Board Datasheet PDF Boardoza MicroSD STEP File FAQ Which communication interface does this adapter use? It uses the SPI communication protocol. What input voltage does it support? The board uses 5V input and regulates operation to 3.3V. Which card types are supported? It supports microSD and microSDHC cards up to 32GB. Are the SPI pins 3.3V tolerant? Yes. The SPI pins are 3.3V tolerant. What is the board size? The board dimensions are 20mm x 40mm.
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