UK photographer Mark Nalder created a neato effect with a setup made with a blue LED mounted on a rotating K’nex construction, then shot with an open shutter.
The K’nex Orb was created from a K’nex motor that had two rotating drives at 90 degrees to each other. The vertical axle spun the motor horizontally, while another horizontal axle reached out to an arm holding an LED. (Imagine a big wheel spinning, then the base revolves around.) The shots of me and my hands were simply made by my flash gun, one hand then the other, then my face, all while the shutter was open.
See more of Nalder’s open-shutter LED art on his Flickr page.
Photo credit: Mark Nalder (V a s s)