I prefer cables and pullys driven by electric screwdrivers myself with=20 this sort of project. On 1/9/2015 7:04 PM, James Burkart wrote: > As a safety measure you may want to consider a vehicle loop detector in t= he > ground to detect when a vehicle is under the gate so it doesn't come down > and cause damage. > > -- > Sincerely, > > James Burkart > *Filmmaker & Documentarian* > > *Burkart Studios* > 415.738.2071 | Phone > 925.226.4910 | Fax > > *Web:* burkartstudios.com > *Facebook:* facebook.com/burkartstudios --=20 John Ferrell W8CCW Julian NC 27283 It is better to walk alone, than with a crowd going the wrong direction. --Diane Grant --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .