Long Exposure Light Sculpture
For this project I wanted to focus on budget being a priority and ultimately that drove my choice to use PVC for this build. PVC Pipe is available at any home improvement store and is very inexpensive. We used 3 one inch “T” fittings and roughly 14 feet of PVC pipe to create the basic frame we built. This cost us 5.00
For the main arm on our Light Sculpture we used one half inch aluminum “U” Channel due to its strength, rigidity and its light weight. This cost us 5.00 for 1 four foot length.
For our secondary arm we are using a one half inch pine wood dowel at 36 inches long. Pine or any other light material with good rigidity will work well as a secondary arm. Cost 1.00
For this project we will need to use a couple Geared motors. Geared motors provide us with 2 highly beneficial features, the move slowly and depending on the gear ratios you can get a good deal of torque out of them to move a heavy load. It is ideal to use a smaller gear motor to power the second arm to reduce the amount of counter weights needed on this light frame. Est Cost Free – 20.00
To create a simple and strong connection to the aluminum arm we will be using a sprocket that is compatible with the drive shaft of our motor. It is a good idea to use a sprocket with an even number of teeth for this if possible
For this project I chose to use two battery packs for the motors, a 2 and a 4 battery style pack with standard 9v connectors on them for easy replacement. Both packs I picked up at our local over priced electronic supply vendor for 6.00 total.
For this project we will be connecting the sprocket to our aluminum arm with a couple ½ inch long 8-32 screws and nuts. Est cost .50
The majority of the connection points in this build will be fastened with zip ties. We chose to use zipties because they are cheap, easy to fasten and easy to remove so we can reconfigure the design this produces with ease. Est Cost 1.00
For this project we will be using some standard 5mm leds. The colors are your choice but I highly recommend using some RGB Fading LED’s for a great effect! Est Cost 3.00-5.00
Ping Pong Balls (optional):
So the final part we used in some of our shots are simple ping pong balls. These simply help to defuse the light of the led so that if the LED is not pointed at the camera it is still visible. This is good for 3D configurations. Est cost 1.00