KilroySmith
Well-Known Member
- Joined
- Oct 28, 2015
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<Moved from Rocketry Electronics>
Has anyone come up with a good launch controller design that can differentiate a shorted igniter from a good igniter?
I was redesigning my 8-station launcher, and was thinking that a short detector would be a great addition to it. Unfortunately, the measurement is extraordinarily difficult, especially when you're trying to not launch the rocket while you're testing it. I figure that a short will show up as roughly 1 ohm, and a good igniter will show up as about 2 ohms, and I've got about 1 ma to do the measurement with.
Any thoughts that don't involve a budget that makes me forego my next rocket build?
/frank
p.s. The pisser is that the chip we make at work would be the perfect solution - it's designed to measure microvolt changes to millivolt level signals and I can get them by the handful, but:
1. I don't know how to do a cheap chip-on-board attachment
2. I was planning on publishing the design in the NAR mag for others to use, and they certainly wouldn't be able to get the chips.
Has anyone come up with a good launch controller design that can differentiate a shorted igniter from a good igniter?
I was redesigning my 8-station launcher, and was thinking that a short detector would be a great addition to it. Unfortunately, the measurement is extraordinarily difficult, especially when you're trying to not launch the rocket while you're testing it. I figure that a short will show up as roughly 1 ohm, and a good igniter will show up as about 2 ohms, and I've got about 1 ma to do the measurement with.
Any thoughts that don't involve a budget that makes me forego my next rocket build?
/frank
p.s. The pisser is that the chip we make at work would be the perfect solution - it's designed to measure microvolt changes to millivolt level signals and I can get them by the handful, but:
1. I don't know how to do a cheap chip-on-board attachment
2. I was planning on publishing the design in the NAR mag for others to use, and they certainly wouldn't be able to get the chips.