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Update September 2013: What started as a hobby has turned into something pretty serious. We are readying the launch of an open-source cinematic motion-control rig. If you wanna stay up on the futue of cinematography "like" us at facebook.com/openmoco
Click here to see my latest modification: Jib arm
-2 Sets of Roller Blades (16 wheels/32 ball bearings) from Goodwill
Motorized Pan Tilt:
-Meade motorized telescope arm
-90 degree angle bracket for connecting the camera to the telescope arm
-1/4 20 bolt/screw or regular tripod head
Something long, straight, and rigid. Obviously aluminum is the best choice, both for it's rigidity and portability. Because the trolley is built with all-thread the width can be adjusted to fit almost any track - so you can use aluminum extension ladder or a 2x6 from Home Depot. I am currently using to two rails from an aluminum server rack. I cut some strips of perforated steel plate to attach the two rails with exact spacing.
Motorized Trolley Movement:
-Parallax (Fubatu) Continuous Rotation Server
-Parallax SumoBot Wheel & Tire
-6v AA Battery Holder (Holds Four AA's)
I usually move the dolly by hand but for time lapse or slow movement I use a Parallax continuous rotation servo with a wheel that is attached to the trolley. The servo is control via a Traxxas radio and receiver. The Traxxas radio also has speed/direction potentiometers on it - so you dont have to hold the radio during movement if you dont want to.
This project contains some remixed elements from the these projects:
DIY video & timelaps electrical dolly
DIY Inexpensive Camera Slider
music credits, in order:
Ror-Shak - Interlude #1
Pretty Lights - Forever Lost
BT - Flaming June (Chicane Remix)'
Bear Hands - Crime Pays