Monday, August 17, 2015

Arduino controlled yogurt incubator

I finally completed my first project that is somewhat useful. I made a yogurt incubator by controlling the temperature in the oven with a heating element (in this case a worklight).

Yogurt incubator setup. Arduino chip is on bottom right, thermocouple reader is on top right,
relay is on bottom left and outlet controlled by relay is on top left

Here is a plot of the temperature as a function of time. The arduino is programmed to maintain a temperature of 110 +/- 4.5 degrees F.

Here's a video showing the relay turning on the light when the temperature dropped too low.