Do you own a milling machine that isn’t quite precise enough for an IC you want to use? This castellated adapter board can help you use that IC in your next project by adapting that package to a 1.27mm-pitched castellated board that you can design your project around.

This replaces the slightly earlier version at https://www.oshpark.com/shared_projects/OnER0jUi by adding slightly more space between the corner pins on the board to make placing this board on its footprint require a little less precision.