I am trying to save some data from Arduino to a SD card to transfer later on the PC. So I decided to follow this:
My setup is
-LCstudio SD card reader (I know, it’s cheap… )
-protoboard for connection
-Texas Instruments’ CD74HC4050E level shifter chip for the 5->3.3 volt conversion (http://www.ti.com/lit/ds/symlink/cd54hc4049.pdf)
The schematic of the connection is in the photo that I have attached. The sketch that I am using is the CardInfo example in the SD library, changing the CS pin to 10. I have verified that all pins are connected properly as the wiring scheme requires (http://www.instructables.com/file/FGX1BX7H5ECMZWK) by setting high each single pin and checking that the voltage at the interface with the SD card reader is 3.3v.
I tried both using a 2GB card or a 8GB card (SanDisk) but the error is always the same, the card fails to initialize.
Is there a problem with my schematic? What is wrong with what I am doing? I tried everything I could find in this forum and I just run out of ideas…