Are all SD board the same?

Hello,

I was wondering if all these board are the same (especially talking about writing speed)
There are some dirty cheap board like this:
Free shiping 1PCS/LOT Micro SD TF Card Memory Shield Module SPI Micro SD Adapter For Arduino
http://www.aliexpress.com/item/32569123682/32569123682.html

Or other for example from adafruit at more than 20 times this price

What is your experience?

I think the write speed is more determined by the card than the adapter.

About the only technical difference between boards is that some are 3.3v only, some are 5v like this one, and some have pins for both. I believe the only other consideration is physical. This is not a shield, it is freestanding, and would not be a good choice for installing on a shield, as the pins are on the wrong side..

There is probably nothing dirty about this board, unless you have a thing about buying cheap stuff from China.

An SD adapter for twenty times the price probably does a lot more. That price sounds like it is actually an ethernet shield with SD included. On that matter, it is common to have SD included on other devices like ethernet and display, and you may find you don't need this.

I think it s just an adapter...

Well, there you go... At that price I wouldn't normally bother to look but, I see

  1. It can run on 3.3 or 5v
  2. You get to solder in your own header - the way you want it.
  3. The board has rounded corners.

Just what everybody needs.

Round corners for only 7$ more ahahah you are right its what everybody needs :smiley: