SD card reader module*

The module that facilitates the connection of the SD card to the main board (e.g. Arduino or STM32Discovery). It is powered with the voltage of 5 V or 3.3 V. The communication interface is a popular SPI bus.

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Price 5,50 zł

Description: SD card reader module

The module that facilitates the connection of the SD card to the main board (e.g. Arduino or STM32Discovery). It is powered with the voltage of 5 V or 3.3 V. The communication interface is a serialSPI bus. The pins are the popular goldpin connectors to connect the memory card to the development kit (for example, STM32Discovery or Arduino) via wires.


SD cards, normally, are working with the voltage of 3.3 V so to connect the device to Arduino, it is necessary to apply a voltage converter. A detailed description of the connection is under this address.


Technical specification of the reader module of the SD cards 

  • Supply voltage: 3.3 V or 5 V
  • Communication interface: SPI
  • Built-in voltage regulator 3.3 V (LM1117)
  • Installed slot for SD cards with ejector
  • Module dimensions: 50 x 31 mm
  • Diameter of mounting holes: 2.2 mm


Readers of this type may contain small scratches and defects arising from manual soldering of the elements but their functionality is fully preserved. For more demanding users, we recommend the modules that are covered with a special varnish, for example, the SD card reader from the SparkFun.


Scheme of the system of the SD card reader

The board consists of: SD card slot with ejector, a voltage stabilizer and, necessary for proper operation, the passive elements.

Diagram of the module with the reader of SD cards.




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The table presents available forms of delivery in Poland


Carrier and

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by cash


Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

terms of service

14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!


  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.