Hello everyone, I’m trying to build a kind of watch that stocks data from the arduino nano accelerometer into a micro sd card. However the nano arduino 33 ble runs at 3.3v and can’t provide 5v to the sd card reader. I used a level shifter between the arduino nano and the micro sd card reader to adapt the voltage, but it still doesn’t work. I changed the wires, the sd card reader, I formated the sd card and all the material is new but it still doesn’t work when I try to initializ the sd card. I tried multiples scripts with chipSelect=10. This my set up. Thanks you very much for your help🙏
Where exactly is the SD card getting its 5V supply from ?
A voltage level shifter cannot boost the voltage on its own. It must be supplied from somewhere else. From your diagram is seems that you expect to input 3.3V to the level shifter and get 5V out of it
Yes you’re right that’s what I tried to do 
. I am a beginner in arduino I didn’t know that the level shifter needed to be powered externally. What do you think I should do? Thanks you very much for your time
Very interesting, what sd card reader did you use for this set up? Thank you for your time
Power the voltage level shifter with both high and low voltages
If you buy one like this then you don't need any level shifting , since NanoBLE is a 3V device --
The NanoBLE doesn't have a 5V available.
Apparently , it does --
Nano-BLE-Sense-pinout.jpg (1542×942) (etechnophiles.com)
How did you connect the adaptater to the arduino nano please ?
Wow , your solution is the cheapest and most available one.
Shapo !!!