Re: [altusmetrum] Pyrochannels broken(?)

2015-02-05 Thread Andreas . Pahler
On a sort of similar note, how many amps at say, 12 volts, can you put through the outputs for say, 1/5 of a second? I can't seem to find any mention of a similar spec in the manual. Bdale sent me this some time ago on this topic, I found it very helpful:   The FET switches we're using on all

Re: [altusmetrum] Pyrochannels broken(?)

2015-02-05 Thread Andrew Wimmer
On Thu, Feb 5, 2015 at 2:11 PM, andreas.pah...@gmx.de wrote: Cutting to the chase, the Si7232DN specs are 25 amps *continuous* at 20V at a temperature of 25C. In pulsed mode, they're rated for 40A. However, those specs are a little mis-leading because it really is all about the heat

Re: [altusmetrum] Pyrochannels broken(?)

2015-02-05 Thread Bdale Garbee
andreas.pah...@gmx.de writes: Hi guys, one of our TeleMega devices shows a very strange behavior with its pyro channels Apogee and D. Both of them show no continuity, which means 0,00 V reading of the corresponding igniter voltage. If you have a voltmeter, probing around to see if there's

Re: [altusmetrum] Pyrochannels broken(?)

2015-02-05 Thread Andrew Wimmer
On a sort of similar note, how many amps at say, 12 volts, can you put through the outputs for say, 1/5 of a second? I can't seem to find any mention of a similar spec in the manual. Thanks, -Andrew On Wed, Feb 4, 2015 at 6:36 PM, Keith Packard kei...@keithp.com wrote: andreas.pah...@gmx.de

Re: [altusmetrum] Pyrochannels broken(?)

2015-02-04 Thread Keith Packard
andreas.pah...@gmx.de writes: Hi guys, one of our TeleMega devices shows a very strange behavior with its pyro channels Apogee and D. Both of them show no continuity, which means 0,00 V reading of the corresponding igniter voltage. Also, when fired manually they do nothing at all. I can't