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