# SD Card is not working (data logger) in a rocket

**URL:** <https://forum.arduino.cc/t/sd-card-is-not-working-data-logger-in-a-rocket/985701>\
**Category:** Storage\
**Created:** [April 27, 2022, 1:33pm UTC](https://forum.arduino.cc/t/sd-card-is-not-working-data-logger-in-a-rocket/985701 "2022-04-27T13:33:50Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![ethan4d4](https://avatars.discourse-cdn.com/v4/letter/e/4491bb/32.png) [@ethan4d4](https://forum.arduino.cc/u/ethan4d4)\
**Post date:** [May 4, 2022, 8:39pm UTC](https://forum.arduino.cc/t/sd-card-is-not-working-data-logger-in-a-rocket/985701/21 "2022-05-04T20:39:27Z")

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> [@sterretje](#):
>
> Your use of LED\_BUILTIN might be interfering with your SD card;

Thanks ! The led was effectively interfering. However, it still doesn't work...

> [@ShermanP](#):
>
> conflict between analogWrite and SPI

I tried but it doesn't seem to be a problem.

Therefore, i will do more tests this week (It may be 33 IOT arduino which isn't compatible).  
If you have any other ideas, please tell me.

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**Author:** ![ShermanP](https://avatars.discourse-cdn.com/v4/letter/s/b19c9b/32.png) [@ShermanP](https://forum.arduino.cc/u/ShermanP)\
**Post date:** [May 4, 2022, 9:10pm UTC](https://forum.arduino.cc/t/sd-card-is-not-working-data-logger-in-a-rocket/985701/22 "2022-05-04T21:10:41Z")

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The only thing that comes to mind, besides power issues which I've already mentioned, is running the two sketches on a regular Nano. But I'm not sure what that would tell you. If you get the same results on a regular Nano, you're still no closer to finding the problem. Anyway, I just hope you have made sure the voltage on the SD module's Vcc pin is not drooping when you are writing to it. You said something about powering it from a battery through resistors, which sounds very dodgy to me, and which isn't what your schematic and pcb image show. If I think of anything else, I will post about it, but I think I've run out of ideas. I've never used that Nano IOT or the SAMD21 processor before, so have no relevant experience to bring to this.

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [October 31, 2022, 9:11pm UTC](https://forum.arduino.cc/t/sd-card-is-not-working-data-logger-in-a-rocket/985701/23 "2022-10-31T21:11:38Z")

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