automated curtain

Discussion in 'The Projects Forum' started by senjit501, Jul 4, 2011.

  1. senjit501

    Thread Starter New Member

    Jun 27, 2011
    My project is to make an automated curtain system which closes at night & opens at dawn.

    It'll be controlled by a LDR

    i am having problem with the circuit can any one help me with the circuit
    will be great full

    i only have this symetic diagram
    the problem is how to reverse the motor and add an on off switch
  2. SgtWookie


    Jul 17, 2007
    This sounds like a homework assignment by a teacher or professor. Is it?
  3. country john

    New Member

    Jan 4, 2011
    You need to insert a motor control relay. ON power up, the DC motor opens the curtain. When you are ready to close, you simply reverse the polarity on the motor leads to get the motor running the opposite way. You can do this by a separate switch that controls the motor relay, or have the unit shut itself down after the curtain reaches the fully closed position.

    How do you know when the curtain reaches the fully open or closed position? You need to have an open (and closed) limit switch in your circuit.