The thickness of the paper detector

Published:2011/7/21 22:30:00 Author:qqtang | Keyword: detector, thickness | From:SeekIC

The working principle of the circuitThe thickness of the paper detector circuit consists of the power supply circuit, infrared detection circuit and control executing circuit, see as figure 8-143. The power supply circuit consists of the power supply transformer T, rectifier diode VD1-VD4, filter capacitor C1-C3 and 3-terminal regulator IC2 and so on.The AC 220V current is stepped down by T, rectified by VD1-VD4, stabilized by IC2 and filtered by C1-C3, then it becomes a 12V DC voltage and it is provided for the infrared detection circuit and control executing circuit.



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