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I have an countdown timer and I want it to launch my model rocket. But the Rocket igniters wont ignite with just 1 volt. So What could I use as an electronic switch to activate the other power source (3 to 9 volt battery)
And got the following answer:
Well, dealing with two different power sources, you definitely need a relay. and it's pretty simple from there on, hook up your 1v supply to the relay, once the relay contacts close then it'll active the 3-9v supply and ignite your rocket. I'm not sure if this is the type of answer you're looking for, but if you want (just say in additional details) I can go into more depth of what kind of materials you'll need and how to hook it up.