: From my Arduino, if I feed the card from the 3.3 V output, I get the
Card type: SD2 Could not find FAT16/FAT32 partition. Make sure you've formatted the card
It only works on 5 V (but the card type becomes SDHC). So I've tried to feed my card with another 3.3 V/5 V supply (my Arduino is grounded to this supply as well), but this is only working on 5 V. On 3.3 V my card isn't detected. My wires to the SD card are about 15 inch. I don't know if it can affect it drastically, but this is the only 'weird' thing about this circuit. By the way I naively think my 3.3 V supply should handle that.
把3.3V的供电改为5V供电就可以了,我刚解决了问题 |