A general purpose microSD card reader breakout board.



  • 3.3V tolerant
  • Activity LED lights up when the SD card is being accessed
  • Push/Push socket with overhung card for easy insertion and removal
  • Four mounting holes
  • Card detection pin
  • Breadboard friendly 0.1" / 2.54mm header
  • Can be mounted horizontal or vertical
  • Compatible With Most Microcontrollers
  • Pull up resistor on CS
  • Decoupling caps for SD card
  • Option to add pulldown's on MOSI and MISO lines if required (requires soldering and resistors)

Open Hardware

The microSD card reader is an open source harware project. All schematics, PCB layouts and gerber files are available on GitHub

Status LED

Builtin red status LED to indicate microSD card activity. Only flashes when SPI SCK active and CS selected.

Breadboard Friendly

Option for straight and right-angle 0.1" / 2.54mm pin headers for vertical and horizontal breadboard utilisation.

Convenient Mounting Holes

Mount the board anyway you see fit with four M2.5 mounting holes and versitile header options.