More info at: facebook.com Since I wasn't able t' buy an altimeter yet, I decided t' build a simple electronic delay timer. Avast! T' video demonstrates how it works in principle. Well, blow me down! For use in a model rocket, shiver me timbers, just replace t' LED with a low current igniter. If you need t' use a high current igniter, just use 2,3, (or as many as you can), 9V batteries, matey, in parallel.