Drink Heater/Cooler
- Hot drink in styrofoam or paper cup
- TMP 36 temperature sensor waterproofed in clear shrink-wrap ( https://www.adafruit.com/products/165 )
- Piezo or miniature speaker
- 3-color LED ( http://www.adafruit.com/products/1655 for example)
- Optional:Immersion Heater http://www.amazon.com/Instant-Immersion-Heater-Portable-Beverage/dp/B000VK0DRY/ref=sr_1_1?ie=UTF8&qid=1427064056&sr=8-1&keywords=immersion+heater+for+water
Drink is either being heated up( using immersion heater) or cooled down.
LED indicates approximate temperature
Speaker sounds when correct temperature reached.