SparkFun Break Away Headers - 40-pin Male (Long Centered, PTH, 0.1") Connectors Tree Stands 0mm OD) that you may

0mm OD) that you may need to increase the hole diameter on some perf boards

It translates the 5V serial signals to 3

Works great as an physical indicator without notifying anyone but the wearer

Two lenses combined for easy storage and transport

Well it should

SparkFun Break Away Headers - 40-pin Male (Long Centered, PTH, 0.1") Connectors Tree Stands 0mm OD) that you mayThis is a row of 40 break away headers spaced 0. 1" apart with long pins on both sides. This header is especially useful when you need to connect a PCB to a solderless breadboard. Each header can be broken apart to your preference to fit custom PCBs or general custom headers. Documents: Dimensional Drawing