Chapter 4: Surface Return
The pressure gauge is in the red zone. You need a depth display for your ascent to the surface. Wire a 7-segment display to show numbers and build a depth counter. Learn how individual LED segments form digits and characters.
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A lesson from 30 Days Lost in Space (31 filmed lessons (Day 0 to Day 30), about 10 hours of video), taught by Dr. Greg Lyzenga, a Harvey Mudd College physics professor and NASA JPL scientist.
The video lessons are free to watch. Get the kit at craftingtable.com — $60 (sale price through November 1, 2026; regularly $97). 30-day returns.