Jul 18, 2017 #1 J JustMattyModding Enthusiast Messages 119 Reaction score 5 I tried using a qsb and don't work so i desoldered it so. Im going to make my own sd rw for the 4gb corona v2 . Here is a pic of pin layout. Can I use a different ohm resistor? Or dos it have to be 68 Ohms?