GL823K TF (Micro SD) card reader

The TF card reader based on the GL823K chip
has been soldered and verified (1.0V).
Please note that you may need to verify the subsequent upgraded versions yourself.
 
2022/4/7 -> 2.0V The wiring has been modified.
2022/6/12 -> 3.0V The card holder has been changed to a self-popup card holder, the layout has been redone, the range of resistors and capacitors has been given in the schematic diagram, and the package has been changed (0805->0603).
2022/6/12 -> Updated the dual card holder version (SD standard card and MicroSDTF). Please note that when using this version, only one of the two card holders can be used. (Verified)
 
2022-6-27: Updated the physical picture of the dual-card slot version. Thanks to radeonr9 for the verification and return
 
speed test, which is about 20mb/s (this depends on the quality of the card you use and the PCB layout. I am using the JD co-branded card 64G here)
 
 
If you need to use this project, please refer to my BOM table (do not refer to the BOM below, it is the sum of several schematics):
I used hyperlinks for some component packages that need attention, you can click to enter the corresponding product page for reference.
 
1.0-2.0V BOM:
Component Name
Quantity
Position
GL823K
1
U1
Plug-in MicroSD card (TF card) Card holder
1
CARD2
0805 package LED
2
LED1 LED2
0805 package 1-10K resistor
2
R1 R11
0805 package 10-22uF capacitor
2
C1 C10 
0805 package 100nF capacitor
2
C2 C3
USB connector
1
USB1
 
3.0V BOM:
Component Name
Quantity
Position
GL823K
1
U1
Self-eject MicroSD card (TF card) Card holder
1
CARD1
0603 package LED
2
LED1 LED2
0603 package 1-10K resistor
2
R1 R11
0603 package 10-22uF capacitor
2
C1 C10
0603 package 100nF capacitor
1
C3
USB connector
1
USB1
 
dual card holder version: please use 3.0VBOM table + plug-in standard SD card holder short body x1