.....so far, lots of views, however, no replies. It appears, there are many members interested in this project. So, lets start with the basics. A control box running actuator motor(s) has wide applications. The control box, usually, outputs a DC voltage to its ports, when a button on the handset is pressed, and the rotation of the motor depends on the direction of current. The simplest connection between an actuator motor and the control box is a mono phone type connector. There are quite a few circuits on the net, just google "dummy load circuit" or "dummy load" under images. Most of these employ a Darlington pair in their final stage. Here is a URL: https://www.google.com.au/search?q=dummy+load+circuit&client=firefox-a&rls=org.mozilla:en-US:official&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjzn5S_w-PKAhWmGaYKHdH5B_QQ_AUIBygB&biw=1280&bih=656#imgrc=_ The output voltage from the control box can be thought as a pulsed DC of variable duration. However, most of the circuits, in the above url, impose a restriction because the final stage is not bi-directional. One way of overcoming this limitation is a to use a full-wave bridge rectifier, to turn the "negative pulse" into "positive pulse" ...... more to follow