Clay & Carly Dunsworth <[email protected]> writes: > I find myself in quandary using this method because per the write up it > removes the charges from the voltage meter since your ignoring the > power-side terminals, and status from altos. Something I like having because > it makes me feel warm and fuzzy. (a hunch that's what happens, since the > power side is now circumvented completely.- the way I interpret it.)
Nope. You still get pyro voltage readings. That's because the FET is configured as a low-side switch... provides a path to ground when fired. The continuity check circuit works by measuring the voltage across the FET. If there's no e-match present, the voltage will be near zero. If there's a match present, it'll be up near the battery voltage... how close being of course a function of the resistance through the match. I designed the circuit so that we can measure the voltage without issues when an external pyro battery of up to 12V nominal is used (15V limit). > Bdale, I will try to get you some photos of the TeleMetrum using this > method. Let me know when you get the 160mah batteries in, I want to use 3 of > them in series to fire charges in my next big rocket. They arrived yesterday. They look great, but I want to play with one on the bench before we sell any. I'll try to do that have them up for sale in the store this evening. Bdale
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