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Maybe the Admins can trim this thread and start a new one on Pad Box safety.
Here's my design. It has gone through revisions since 1996. The pad box will work with a wired length of orange extension cord, or as part of a wireless system.
There's an audible screaming alarm if the relay is stuck before arming it. There needs to be an igniter connected, but to test the system before a launch I just connect the clips to make sure there isn't a stuck relay. For the user, if they hear the alarm before arming, disconnect the igniter and tell the RSO/LCO.
The other feature is the autoreset thermal breaker. Cheap automotive part. Protects everything from dead shorts when the button is held down, but has more than enough current for several seconds to light a cluster.
I have a bill-of-materials if anyone is interested.
Here's my design. It has gone through revisions since 1996. The pad box will work with a wired length of orange extension cord, or as part of a wireless system.
There's an audible screaming alarm if the relay is stuck before arming it. There needs to be an igniter connected, but to test the system before a launch I just connect the clips to make sure there isn't a stuck relay. For the user, if they hear the alarm before arming, disconnect the igniter and tell the RSO/LCO.
The other feature is the autoreset thermal breaker. Cheap automotive part. Protects everything from dead shorts when the button is held down, but has more than enough current for several seconds to light a cluster.
I have a bill-of-materials if anyone is interested.