Day 07: We still need to keep an eye on this — 30 Days Lost in Space

Home → Courses → 30 Days Lost in Space → Day 07: We still need to keep an eye on thisChapter 2: Solar Array Repair
Day 07: We still need to keep an eye on thisThe solar panels are working but you need to keep monitoring them. Build an improved battery monitoring system using a phototransistor for more accurate light detection. Learn the differences between photoresistors and phototransistors.
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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.