Introducing PUSH-UPs, an articulated display panel.
PushUps: a prototype for an articulated display surface
This is a 8 “pixel” prototype of a animated surface display system. The final goal is to create a surface with a hundred or more separately articulated “pixels” to create a dynamically changing topography. Stimulus for the larger unit may be from a camera, an arrays of sensors, or purely from software that simulated different surface topologies.
I’ve been talking about designing an articulated tabletop for sometime now – taking my inspiration from TRANSFORM, from the Tangible Media Group at MIT Media Labs. While I am not trying to copy their design, the key to this idea is in the design of a moving “pixel” that is small, provides several inches of “travel”, is able to be illuminated and, most importantly, cheap! This allows the design to be scaled to whatever size is desired. As this “pixel” element is actually a linear actuator, I have considered and experimented making all sorts of actuator designs but nothing I came up with is satisfying these criteria. In the video we can see that the table-top part of each pixel is a small square-section plastic tube connected to a wire or plastic linkage that connects to the control box below. But what is this control element and how does it provide the 4″ of travel that the video shows?
In a telephone discussion with Doug, an engineering colleague of mine, we noodled through some simple design ideas that would use cheap and readily available servo motors to articulate acrylic rods that can pass light.
So, the seeds of this prototype design were sown.
So, voila. PUSH-UPs.
I have made many designs using servos (see PopUp Clock, and Flipper) and I had plenty of the small metal-geared MG-90s on hand. In addition, I have created lots of clocks recently (yet to be posted) that use acrylic rods as light pipes for colourful displays so I had lots of 1/4″ and 3/8″ rod stock. And of course, I always have yards of addressable LEDs.
PushUps: going through the motions. Picture captured the unit articulating a sine wave