I buy a lot of these stackable Arduino header
sets because they are handy for a lot of things. I make some breakout boards with them, I use them to add some clearance between a taller shield and the next shield that I am stacking on top, and sometimes they are necessary when a shield doesn't come with headers or comes with only male headers. I recently found this set of stacking headers
on Adafruit that includes the standard 6, 6, 8 and 8 pin headers as well as a 10 and a 3 pin header. Also, Sparkfun has recently started selling R3 stacking headers
, which include a 10 pin header instead of one of the 6 pin headers like the old sets.
My most recent use for them was to create a "shield" like the Wingshield
. I don't really want the screw terminals, so instead I wanted something that I could still use regular jumper wires for quick prototyping. I figured I could cut up some perf board and make something that would allow me to split the input and output headers.