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Topic: 3.3v sdcard reader on 5v nano? (Read 209 times) previous topic - next topic

steveh2112

Mar 10, 2019, 02:50 am Last Edit: Mar 10, 2019, 03:05 pm by steveh2112
i just got this https://www.ebay.com/itm/5PCS-Mini-SD-Card-Module-Memory-Module-Micro-SD-Card-Module-for-Arduino-AVR-EVE/233095018500

as you can see, its a bit light on description but clearly labeled 3.3V. to connect to a nano, will it be ok to view 3.3v to the 3.3v output on the nano board and the data lines to nano direct? please tell me i don't need level shifters?

thx

FYI, i just connected it and it seems to works after a quick 2 min test, but not sure if its within spec or not

actually, its not really working, i think it draws too much power from the 3.3v reg out on the nano board

guess i'll have to find a 5v micro board

knut_ny

Run your nano @ 4V (Li-ion-battery) and u'll be fine.
This will probably work just fine @ 5V, as there seems to be 10k in all data-lines
Ny

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