Can someone identify this?

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neil_w

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Whatever it is it's fairly old. :) I have no idea but I'm going to take some guesses just for fun.

I see a PIC micro, a couple of relays, and some discretes. Whole thing looks hand-made. Seems to be a two-channel ejection controller but I don't see any obvious sign of altitude-sensing components. Therefore I posit that the two channels are timer-controlled, using time values selected by the two dip switches up top. Can't tell what triggers the timers to start. Hmm, maybe a timed air-start controller rather than ejection controller.

OK that's my wild guesswork. I look forward to finding out if I'm even in the ballpark. :)
 

Cameron Anderson

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I agree with your assessment, Neil. The G switch in the lower left quadrant made me think timer. The two larger LEDs are continuity indicators triggered by the push button to their left. I powered it up with a 7.4v lipo, it came wired with a 9v connector, and the continuity indicators work. And the smaller LED near the top flashes regularly when powered.

I wonder if a drop test would be enough to trigger the G switch? I could measure the time delays of the various dip switch positions with an LED hooked into the outputs.
 

rharshberger

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Is that a mechanical G-switch just to the left of the lower relay (silver cannister)?

Edit: Cameron answered that question while I was typing mine!
 

neil_w

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Ah, I failed to identify the G-switch, thought it was a capacitor. Whoops. :)
 
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