What blocks a signal?
Inventors (Intermediate), mission I9 Signals & Remote Control, lesson 3 of 6.
Hook
Can infrared light pass through paper? Through your hand? Round a corner?
Fair test
Test 5 blockers (paper, cloth, hand, book, mirror bounce). Record: works / doesn’t work.
Bonus challenge
Bounce the signal off a mirror to drive the train round a corner.
The build
- 🚂 Floor Express: A remote-control locomotive with headlights, a chimney and a log wagon. (level 4 of 5, about 40 minutes, 17 steps)