Althaus SparkFun - microSD Transflash Di Okt 7 2014 MicroSD SD storage Storage BOB-00544 https://www.sparkfun.com/products/544 Breakout board for the microSD socket that is not much bigger than your fingernail. Compatible with the SPI interface found on any SD card, this tiny form factor was created for cell phone storage and is perfect for your next MP3 project! Board comes fully assembled and tested. The bare socket is available. ground

serial clock

voltage collector collector - IC power supply pin

data in

card select

card detect

data out