Make your own Arduino-controlled yoghurt maker

A homemade thermostat attachment for a crock pot (or other electric heating device). It can be used to precisely control the temperature of the crock pot for things like yogurt fermentation.

How

The crock pot is attached to a relay that can switch it on or off. The relay is toggled by a microcontroller based on readings from a temperature sensor (thermistor) placed inside the crock pot.

Make your own Arduino-controlled yoghurt maker

Update:
this is interesting however it’s a substantial amount of work for a beginner (me) and frankly there are many methods that don’t require such extensive technological/electronic input.