So this looks like it wasn’t even something that was built from components, but basically just the guts of a commercially manufactured digital alarm clock put into an aluminum pencil case. I would imagine the beeping while it was in the backpack was the AC power outage warning since it wasn’t plugged in (assuming there was a 9V battery still connected at the time). Not necessarily a sophisticated project, but still something I’m sure I would have been proud of at that age.
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