time delay help

Discussion in 'The Projects Forum' started by kuxz2008, Nov 24, 2009.

  1. kuxz2008

    Thread Starter Member

    Nov 16, 2009
    i am trying to build a time delay circuit for my car. the output from the 74LS193 Qa, Qb, Qc, Qd will be connected to a AND gate. when 1111 is present at Qa, Qb, Qc, Qd, this will then send a '1' to the motor. i wanted the motor to start moving after like 1-2sec after '1' is send to the motor.
    wht do i nd in order 2 build the delay circuit that is connected from the output of 74LS193 to the motor?
  2. mik3

    Senior Member

    Feb 4, 2008
    A 555 monostable circuit triggered by the AND gate is an easy solution. Google '555 monostable' to get its schematic diagram.