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Question:

How can i I turn this egg timer into an air worthy delayed ignition system fort model rocket?

I tinkered with it and I couldn't get it to turn on a light bulb. My Idea came from youtube I got the exact parts he has the same circuit board the only thing I'm not showing are two switches and my battery i have the switches to keep the current from going to transistor when I turn the thing on, the second is a mystery to me. The circuit board power terminals are on the far left (right:positive) the speaker terminals are on the far right mid board (bottom:positive) He wired the the speaker wires to the PNP transistor and then later added NPN transistor (i was at radio shack and thought about buying a bigger one but the guy said stick with his exact layout until I get the hang of things) I don't know where to put the transistors and have no idea about the switches but I'm assuming one goes from the speakers output to the first transistor

Answer:

Take the speaker off and connect the contacts to a relay that leads to circuit containing a larger power bank seeing that most kitchen timers now run on one AAA battery. Then to clips for your e - match . Note with this design the timer signal will pulsate the relay for a single on switch it is required to connect the secondary coil contacts to the primary so the circuit keeps its self closed then after launch the circuit will open by itself

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