Simplify the following text for a Grade 15 native English-speaking person.
Original: Physically , embedded systems range from portable devices such as digital watches and MP3 players , to large stationary installations like traffic lights , factory controllers , or the systems controlling nuclear power plants .
Simplified: Physically , embedded systems range from portable devices such as MP3 players and digital cameras , to large systems like traffic lights , factory controllers , or the systems controlling nuclear power plants .