seeking for basic USB SD card reader schematics.

Hello everybody and Happy new year,

I am looking for a USB micro SD card reader schematics, Please help me.

thank you.

You won't learn much since USB SD readers have a single chip.

Here is a link.

This chip works with SD cards, MMC cards, and Memory Sticks.

They cost $2.00 - $3.00 in quantity.

Another chip.