Air humidity indication circuit
A technology for indicating circuit and air humidity, applied in the direction of material resistance, etc., can solve the problem of not being able to detect and feedback immediately, and achieve the effect of simple structure and lower production cost.
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[0021] The present invention will be further described in detail below through specific implementations:
[0022] The reference signs in the drawings of the specification include: resistor R1, humidity resistor R2, resistor R3, humidity resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, variable resistor RP1, variable resistor RP2 , Variable resistor RP3, inductor L1, inductor L2, operational amplifier IC1, operational amplifier IC2, operational amplifier IC3, operational amplifier IC4, capacitor C1, capacitor C2, voltmeter U1, Zener diode D1.
[0023] The air humidity indicating circuit includes a humidity detection circuit, a signal amplification circuit, an impedance conversion circuit and a display circuit; the first output end of the humidity detection circuit is connected to the first input end of the impedance conversion circuit; the second output end of the humidity detection circuit is connected to the signal amplification The second input of the...
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