The spinning radar
Inventors (Intermediate), mission I8 Motors & Circuits, lesson 1 of 6.
Hook
Radar dishes spin slowly all day. How do we slow down a fast motor?
Fair test
Time 5 radar turns. Flip the polarity switch. Same speed backwards?
Bonus challenge
Put a paper “aeroplane” on a stick. Does your radar “spot” it each turn?
The build
- 📡 Spinning Radar: A motor-driven radar dish that sweeps round and round on a turntable — with a blinking light. (level 3 of 5, about 25 minutes, 15 steps)