I know that controlling DC motor direction and speed has been discussed a lot on the forum. I am trying to make a parking bollard (http://www.ultrasecuredirect.com/ac...ity_Remote_Control_Operated_Parking_Post.html) with a DC motor that I took out of a satellite dish actuator. The motor is 36 V, 10 W, 1 A. I am powering it from 12V supply. I need to turn the motor only 90 degrees (to lower the bollard) and return it back 90 degrees (to raise the bollard). I want to control the lowering and raising using one of the ready made RF control units which have 4 relays, each controlled by a by a button on the remote (the idea is to use one button/relay to lower and one to raise) I am going to use limit switches to stop the motor at both ends. My question is can the circuit in this link (http://forum.allaboutcircuits.com/showthread.php?p=261613#post261613) be adapted in any way to do this without having to put the additional relays ?