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Tag Archives: sd card

Workaround for “SD Card Initialization Failed!” in Arduino

Arduino sd card

I was working on a project that involved the use of a SD (Secure Digital) card to log data into a text file. I chose Arduino as it  had a vary stable FAT (File Allocation Table) library. I had an Arduino Mega at my disposal and built a resistive network to step down the logic levels of the Arduino SPI bus at 5v to the SD card’s at 3v3. I was getting voltage levels that were withing the absolute maximum …

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