need help with dc motor circuit design....
  • I am using 12V dc geared motor(holding torque 4Nm).the supply volage is 230V. 
    working criterias: i) the motor should move forward for cirtain RPM(10 to 15) then stop at that position.
    ii) the motor should move reverse with exact the same RPM after supply cut off.
    suggest me cheapest way to fulfill this criterias........