Discussion with dg mulisa
interfacing SD Card : http://easy-pcb.com/blog/interfacing-microsd-dengan-atmega32-fat-32.html Cristal untuk XBee : (1) http://www.sfe-electronics.com/product.php?category=62&product_id=330 (2) http://www.sfe-electronics.com/product.php?category=62&product_id=751 (3) http://indo-ware.com/produk-134-crystal-16-mhz-lowprofile-.html IC 74HC 4050 = 2 BIJI