FYFH2

GL823K Card Reader - SD

Overview

Principle:
Using a GL823K card reader to learn how to wire a card. Thanks to _Alexia_, whose project was referenced (link below): https://oshwhub.com/alexia0/gl823k-du-ka-qi.
The attached file is _Alexia_'s STL shell file for the GL823K card reader.

Purpose:
The reason for modification is that my 3D printer uses SD cards, and my SD card reader is very slow, so I simply modified it. Testing was successful, and it works without problems. The shell hasn't been made yet; it will be added later .
Other:
The purchased SD card slot has a write-protection switch and card ejection control; only a pull-up/pull-down interface was made for convenience when needed.
Actual product image.

Bottom shell.STL

Top cover .STL

Assembly 1.SLDASM

PDF_GL823K Card Reader-SD.zip

Altium_GL823K Card Reader-SD.zip

PADS_GL823K Card Reader-SD.zip

BOM_GL823K Card Reader-SD.xlsx

94960

ESP32S3 development board OV2640 expansion board

Provides a stable OV2640 interface and SDIO SD card interface for the ESP32S3 development board.

It is installed as a baseboard on the bottom of the ESP32S3 development board.
The SD card interface uses the SDIO interface, and
the maximum communication speed of 40MHz has been successfully tested.

Demo.mp4

PDF_ESP32S3 Development Board OV2640 Expansion Board.zip

Altium_ESP32S3 development board OV2640 expansion board.zip

PADS_ESP32S3 Development Board OV2640 Expansion Board.zip

BOM_ESP32S3 Development Board OV2640 Expansion Board.xlsx

94961

electronic

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Update:2026-03-28 11:09:19

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