Measuring atmospheric humidity- humidity detection circuit constituted by the HS1101 3. The output analog voltage measurement circuit U18 via the interface into a digital signal input PC, the AD conversion function is provided by the hardware platform U18, U18 U18 software modules within the software driving the basic functions and the signal processing and communications hardware interface of achieved. 4. As shown, when the atmospheric humidity increases, the capacitance across the small HS1101 using TLC555 oscillation frequency becomes large, the terminal can be observed TP4. 5. After data acquisition and processing software, eventually forming into a certain size with humidity changes the relationship between linear frequency.

大气湿度的测量.vi

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