The auto open/close curtain controller circuit

Published:2011/6/30 3:31:00 Author:Seven | Keyword: curtain controller | From:SeekIC

This controller can recognize the brightness in the room automatically, which can control the curtain and make the natural light in the optimum state. In figure 1, the LDR RD and the time-based circuit 5G1555 compose the brightness recognition sector. The LDR RD receives the natural light and its resistance changes, which is set as RD1, at the moment, RD1 is falling down. The elements and their parameters are shown as follows: BG1：3DG12，BG2：3CG14，BG3：3DG12，BG4：3DG12B。D1～D3：2CP，D4～D7：2CP14，DW：2CW22C/100mA/7.5V。W1、W2：100K，RD：the LDR of the 625 type.



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