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Smart Spoons - 2015

The idea was to build a product helping you to avoid drinking a burning hot beverage. This spoon with a RGB LED should show the tea or coffee's temperature in the mug, shining red when too hot, green when ok, and blue when cold.

Smart Spoons

It was controlled by a small Attiny13 microcontroller, which had almost no current draw (nA) during sleep. When woken up by a button on top, the beverage temperature was measured by a PTC thermistor and shown on the RGB LED. It was powered from two coin cell batteries, which had wires soldered directly to them. I'm never ever soldering directly to coin cell batteries :D.

The electronics was meant to be encapsulated in silicon in a spoon-like shape. Sadly, the project never got that far since the supervisor has lost interest in it because the production cost would be too high. It just proves that making a viable, profitable product is hard... really hard.