The first pin voltage of induction cooker is 5.14V, the second pin is 0.26V, the third pin is 18.45V, the fourth pin is 5.12V, the fifth pin is 4.7V, the sixth pin is 3.86V, the seventh pin is 4.02V, the eighth pin is 1.37V, the ninth pin is 4.76V, the 10th pin is 5.64V, the 11th pin is 1.88V, and the 12th pin is 0V. The output of the LM339 is equivalent to a transistor without collector resistance. In use, the output must be connected to a positive resistor (called a pull-up resistor, 3-15K). Choosing pull-up resistors with different values will affect the high potential value at the output. Because when the output transistor is off, its collector voltage basically depends on the value of the pull-up resistance and the load.
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In addition, the outputs of the comparator are allowed to be joined together