Just a thought from someone else who doesn't have a working Telemetrum either...sounds as though the FIRE command is resetting the computer. Could this happen if the output MOSFET is shorted internally, and pulls the supply voltage below brownout-reset when asked to fire an igniter?
Was the Telemetrum ever able to fire an igniter? Igniters might well have 1.7 ohm resistances 'cold', but hot, they may well be dead shorts. See http://www.gwiz-partners.com/igniters.pdf I'm thinking that when I get my TM back from Bdale's shop, I'll arrange things so that the Telemetrum triggers Radio Shack MOSFETs, which then trigger ejection charges. Harold -----Original Message----- From: Tim Navickas <[email protected]> To: 'Bdale Garbee' <[email protected]>; 'Altus Metrum' <[email protected]> Sent: Mon, Apr 7, 2014 8:41 pm Subject: Re: [altusmetrum] Telemetrum Problems Further information. 1. Uninstalled the software and installed version 1.2.1 all the windows work properly. I have a Telemetrum v1.0 unit. 2. I still cannot fire an igniter. I have tried several different one and every different types..When I arm it then fires it says connecting to COM3. I have always flown this as a data logger and tracker but this will be the first time I have used it for dual deploy. The battery voltage is reading 4.0 volts and the igniters read 3.5 Volts. The resistance is 1.7 ohms for each igniter. I did make the mod to the battery removing the board as suggested. I would like to fly this weekend at KLOUDBURST but am afraid to rely on this altimeter if I cannot ground test. Does anyone have any suggestions for me, I getting desperate. Thanks, Tim -----Original Message----- From: Bdale Garbee [mailto:[email protected]] Sent: Monday, April 07, 2014 1:18 PM To: Tim Navickas; 'Altus Metrum' Subject: Re: [altusmetrum] Telemetrum Problems Tim Navickas <[email protected]> writes: > 1. When the rocket is in the vertical position and armed I start up > the software and it automatically goes into the monitor mode. All data > is green but I cannot close the window without using task manager Not being able to close the monitor window seems really odd / broken. > 2. When the rocket is horizontal position and I want to test fire the > igniters I first arm them and then press fire but nothing happens. > The software says the igniters are connected. Also, after I press > fire the software acts like it is reconnecting to the altimeter.. Does the TeleMetrum beep at you like it's restarting? If not, you're not having a problem with the flight computer, you're having a problem with the ground station software. Given the oddity of not being able to close the monitor window, sure seems like something isn't happy between the altosui application, the Java runtime, and the operating system. I personally know too little about Windows to be much help here. > I have used all this last year with no problems and was wanting to > test before a launch next weekend. Any thoughts? Definitely sounds like something got updated on your computer in the interim that our software isn't happy about. Bdale _______________________________________________ altusmetrum mailing list [email protected] http://lists.gag.com/mailman/listinfo/altusmetrum
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