Book/tablet/phone holder to prevent neck pain/hernia

Neck hernia

Your vertebrae should be straight when doing time consuming things like reading books. Build a structure that holds the books at eye level when you are sitting, laying down, walking.

Examples:

• LEVO Book Holder
• Hold it
• example.

Traffic simulator

Lego + camera to manage traffic congestion. The street with most traffic should have more green light. Two options to detect traffic density:

1. Camera
2. Loop (magnetic field change detection)