hey RR welcome to acidmods. sick name
anyways i am unclear on what you're trying to accomplish. But all as i know how SD memory cards/adapters work is they have 4 serial data i/o pins, a clock pin, a command pin, and power pins.
Regular SD, Mini SD, Micro SD as far as I know are pretty much the same hardware design except for size... So building your own adapter would be nearly pain free. Check out this article i found off of google --> http://cellphonerepairtutorials.blogspot.com/2010_08_29_archive.html
Thanks in advance
Let me try to explain my idea in another way.
I have an MP3 player with a microSDHC slot. I have two microSDHC of 8GB each but my MP3 only has one slot so I want it to have 2 SDs anyway. In theory it is completely possible because I don't want them to be recognized as two cards (2*8gb). I want them to be recognized as 1 card (8+8=16gb), it makes everything easier because I don't have to change the software and hardware, only the memory cards.
What I pretend is to do a sort of RAID with two microSD cards.
If you see the image above (in my previous post), you'll see that that adapter converts 2 microSDHC cards to 1 Memory Stic Pro, so it confirms my idea, there's a possibility to make 2 cards being recognized as only one (I can confirm it, I had one of those adapters and it did his work perfectly).
I found one picture so I can show you how it is inside the adapter:
http://i433.photobucket.com/albums/qq56/icester1973/Fake_5400.jpgI wonder if that little chip helps to transform two cards in one or if it transforms SD in Memory Stick Pro...
Of course it's simpler to buy a 16gb card or even 32gb...but it wouldn't be funny
Well, maybe someone can help me.