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Topic: libellium modul work only with Kingston microSD 2gb SDC (Read 836 times) previous topic - next topic

subsix

Hello everybody,

I use the libellium shields
http://www.cooking-hacks.com/index.php/shop/arduino/shields/microsd-2gb-module-for-arduino.html
to write gps data, i have some microSD card , but only one type work, the Kingston 2Gb SDC ... and i don't why ...

work with ...


but not with


any idea ???

best regards


fat16lib

The Libelium MicroSD module uses resistors for level shifters and many SD cards won't work with it.

The problem is that resistor level shifters do not provide fast enough rise times for the SPI signals and cards that use edge detectors often fail with this module.

subsix

thx you ... do you have solution ?
because i see some sdcard with 4,7k resistor, sometimes with 10k ... and i dont know what is the best way.

best regards

fat16lib

Throw the Libellium module in the trash and buy one of these products:

http://www.adafruit.com/products/254

http://www.gravitech.us/micaad.html

http://www.sparkfun.com/products/9802

There are many other products but make sure what you buy has IC level shifters, not resistors.


subsix

yeah, thx u for your advise,

i'll plan to build a new one with 4050

tchuss

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