Reviews

• Scratch 1/2 Ounce Timer By Jonny Dyer

    This page describes the how to build a very small (1.5"x1.5", ~1 oz.) rocket ejection timer. I have tired to give as complete of instructions as possible, but you still might encounter problems. While it is possible to build this timer without printing a custom circuit board, I don't recomend it. In the past I have used the pre-printed circuit boards that mimic the layout of a ...