The fuzzy logic control algorithms are relatively new direction in the field automatic control systems. These algorithms are similar to the thinking style of humans and give more flexibility over controlled parameter than classical systems theory control methods, which are limited in decisions to discrete set of the measured parameters. The fuzzy logic, however can be extended for any type of controlled parameters, described in usual common words, for example, “not so high”, “neither high, nor low” and so on. Each of these statements defines the percentage of output parameters. The fuzzy logic algorithm in this article is used for temperature control of the drying chambers and has been successfully implemented with usual microcontroller. The device has been tested in a series of experiments and the article contains conclusions of the results of such testing.