List of Material
Five different type of woods
Top three designs are all for sides of the coaster. Its 90mm x 15mm and designed to connect with other sides. The bottom one is for a cutout of display.
Prototyping and Programming
The basic system is arduino. Using thermometer to read the current temperature and via led display to show temperature.
Both temperature sensor and LED display are put in function. So those programs may be reuse.
Three different type of woods are used for each sides. I chose those to imitate French flag and Shonan Like taste. Circle design at the top is for coaster. You may put your glass or mug on top of it.
More stable base.
Implementation of air pressure sensor
Implementation of speaker
Implementation of microphone(like Amazon Echo)