Documents and related theory2.1 electronic thermostat, click module. History and discovery of electronic thermostat module, click the value. In the early 19th century, year 1821 German scientists CD, Thomas Beck (Thomas Seebeck) study found that when the metal wire 2 bottles are made with different types of metal connected both ends together. If the end point is both different temperatures will occur in the cycle flow electricity wire, 1 photo, which both flow of electric current in a circuit, it will change according to the temperature difference at the end of A metal that is both the point and B metal temperature is very different. Electric current flow in a circuit will open, and if high end points per side, Gary will cause the voltage at the ends of the side open. This voltage is called the "sea RAID late Beck"
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