How to prevent your coffee or tea from getting cold?
June 2017 - June 2020
Imagine working hard on a project or being all sucked up in to series. Also you just set a nice cup of tea or coffee for yourself. But you forget to drink it up and after a while you realize it's cold. Bleh! How can I prevent this from happening all the time?
When you place a cup of coffee or tea on this coaster, it will indicate how warm or cold it is through the color of the light. The coaster will turn red when it's warm. But when it's cooling down, it will slowly change the light to blue. In this way, the coaster acts as an indicator of the temperature. And it will also give you a signal whether your cup of coffee or tea is too hot to drink or it's getting too cold, so you can't forget your drink.
Through the color indicators on the coaster, you could see when your tea is hot or getting cold.
Take a peek at the behind-the-scenes how the indicator is built through 3D printing and Arduino. From what I learned over the year I changed the hardware from a quick circuit to a circuit soldered on a circuit board.