Reversing polarity switch with timer

Discussion in 'General Electronics Chat' started by Iskios, Nov 30, 2011.

  1. Iskios

    Thread Starter New Member

    Nov 30, 2011
    Hi, first of all I'm new to this forum.

    My problem is I want to enable a 12v motor using a SPST switch, when pressed the motor turns for a specified time (sec), and when the switch is unlatched the motor turns the other way around again for a specified time (sec).

    I want to build a circuit similar to that of a vehicles power antenna wherein the antenna goes up when the radio is on and goes down when the radio is turned off.