USB Programming Module for Naze / Minim OSD / Frsky / Multi-wii / Ardiuno 3.3V or 5.5V
This handy little device lets you connect to just about any arduino device. This is a must have in the toolbox item
We use this to program Minim OSD, Naze32 Boards, Frsky Receivers, Multii Wii, KK2 and Open LRS to name a few
Has the ability to switch between 3.3V & 5.5V - make sure to check the voltage of the unit that you want to program before plugging in.
If you are having trouble loading drivers they can be found here
Video on how to update drivers on a Windows 7 machine