Monostable protective circuit and automatic control circuit for water heater
A protection circuit and monostable technology, applied in the direction of program control, computer control, general control system, etc., to achieve the effect of ensuring safety and eliminating the danger of gas leakage
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[0027] as attached Figure 4 As shown, the monostable protection circuit used in the gas water heater controller in this embodiment includes a comparator N6B and a first triode V33, the negative input terminal of the comparator N6B is connected to the power supply VCC through the third resistor R52, and The first resistor R48 is connected to the collector of the first transistor V33, and the emitter of the first transistor V33 is grounded. The third resistor R52 is much larger than the resistance of the first resistor R48. The negative electrode of the comparator N6B The input terminal is also connected to the positive terminal of the first capacitor C25, and the negative input terminal of the comparator N6B can be set to a low level or a high level by controlling the on-off of the collector and the emitter of the first triode V33 through an external signal, so The positive input terminal of the comparator N6B is connected to the power supply VCC through the fourth resistor R4...
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