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I thought it might have to do with that too, but all that’s going on there is connecting my battery to a switch. The switch wires deceivingly go underneath the board, but it’s wired exactly according to the Entacore manual: positive battery lead in V+, negative battery lead and one end of switch...

I think I’ll give them a call tomorrow, but most likely the same conclusion will be reached since I’ve quadruple checked the wiring now. My launch is scheduled for November 16th, so in an ideal world I’d have more than enough time to order a new altimeter and get ready in time. Problem is that...

wow... Thank you so much for sharing this. I thought I was doing something wrong and was going crazy trying to figure it out. I guess I just have a defective altimeter.. of course I will try some last ditch attempts to see if maybe it’s a me problem, but if I don’t find anything, I’ll just hold...

Update #4: did it again. Didn’t ignite when I turned the altimeter on and off, I then loaded black powder and put the igniter in the powder well, and it went off the second I turned the switch on again. .....

Update #3: I just put a plain old firewire igniter in the port without any black powder, turned on the altimeter, and it didn’t go off... perhaps I accidentally only secured one wire of the igniter to the screw terminal, and that made it go off during continuity test?? I’m not versed enough in...

Here is my wiring... unless I’m totally missing something, it looks alright to me. I’m really baffled right now and scared to proceed before I figure out what made it ignite unexpectedly like that :/

Hi— I am doing a dual deployment rocket for the first time using an Entacore AIM Altimeter. I got everything set up for an ejection deployment test, loaded my black powder, taped it up, and then went to turn on the altimeter. And the black powder immediately was ignited and the ejection...