I would go with a buzzer instead of an led. And the antenna I am not quite sure,I just use one from and old wireless adapter
Several words of caution and advise.
You can't just use any buzzer or LED for checking continuity. To make a launcher that is safe for all igniters, you need to limit the maximum continuity current to 20 ma or less. If you are using a LED. you need to use a 560 ohm resistor or larger in series with the LED to limit the continuity check current to less than 20 ma. Piezo buzzers may also require a series resistor to limit the continuity check current, but you can find piezo buzzers that draw only 10-20 ma at 12 volts and they can be used as the series resistor for an LED providing both an audio and visual indication of continuity.
Bob
Thanks for the help, I'll look for these
I Saw quite a few of these at GHS Sunday when I was LCO. I'm considering one too. Seems that as a club we (SSS) ought to get a "who's-using-what-code" list going and post it in the Yahoo Group and perhaps on a list inside one of the trailer doors.
12 volt, cheap non-rechargable... might upgrade later... thanks again for your help Jus_Rockets I needed it and it payed off... I'm joing to the park with a bunch of folks and this will help organize the launch... I'm sure I'll see you at Rainbow Valley some day - I'll thanks you again then...
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