Tomorrow Compas

We try to finding a way on tomorrow, but we don't know where is tomorrow.That's why I created a compass that points to tomorrow.

Thinking About Tomorrow

【Define Tomorrow】

Current Time + 24 Hours = Tomorrow

【Abstract "Tomorrow" from the Earth's Orbital Motion】

• Earth moves approximately 2.59 million km in 24 hours.
• Earth Moved 2.59 million km = Tomorrow's Earth

【Calculate the Motion Vector】

1. Coordinate Earth's Position in the Heliocentric Coordinate System

• Current Earth's Coordinates = Point O
• Tomorrow's Earth's Coordinates = Point A

2. Vector from Point O to Point A = Vector OA

3. Coordinate the Observation Point in Geocentric Coordinates

• Current Observation Point = Point Q
• Tomorrow's Observation Point = Point R

4. Convert Vector OA to a Horizontal Coordinate System Based on Point Q = Vector QR

【Final Conclusion】

Direction indicated by Vector QR = Tomorrow's Direction

How it Works

1. Point the device north.

2. Use the ip-api API to obtain approximate latitude and longitude from a Wi-Fi access point.

3. Calculate the vector QR based on latitude, longitude, current time, and 24-hour time.

4. Calculate the azimuth and elevation angles from the vector QR.

5. Move each servo motor corresponding to the azimuth and elevation angles.