The light control toy car of KD-28

Published:2011/6/3 2:37:00 Author:Seven | Keyword: light control, toy car | From:SeekIC

VD1 and VD2 are two light dependent resistors, when VD1 is lighted by a torch, the LEV of the 1-pin of KD-28 is higher than 8-pin, at that moment, the LEV of the output terminal, the 3-pin, is high than the half of the power supply, but the LEV of 5-pin is lower than that, and the toy motor M is rotating forward by the drive of the forward voltage, so the toy car runs forward; if the VD2 is lighted by a torch, the LEV of the 1-pin of the integrated chip is lower than 8-pin, so the LEV of the output terminal,3-pin, is lower than the half of the power supply, and that of 5-pin is higher than half of the power supply, the motor rotates forward.



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