摘要 |
A temperature controller capable of being connected to a computer is able to be stably operated at the time of being connected to the computer. The temperature controller is operated by a power source from the computer and operated by a general power source. A voltage used in the temperature controller includes a first voltage for processing a digital signal. The temperature controller includes a feedback circuit for monitoring a change in the first voltage of the temperature controller and when detecting that the first voltage exceeds a predetermined value, lowering the supply of the general power source, and the voltage of the power source supplied from the computer is smaller than the predetermined value.
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