Theatre Design & Technology - Spring 2006 - 35

they investigate technologies compatible with the DMX512 protocol.
Cleveland had been integrating projector technologies into theatre
productions for most of his career. It was natural, then, that one of his
first ideas for the engineering students was a device to control Kodak
Ektagraphic 35mm slide projectors directly from a lighting console. In
1989, Cleveland and Professor Mark Shanda from The Ohio State University had demonstrated that Ektagraphic projectors could be modified to
dim and advance slides via conventional dimmers controlled by the lighting console. (Cleveland and Shanda 1989, 47-52) However, their
method required opening the Ektagraphic projectors for modifications,
adding bulky autotransformers, and absorbing the loss of two dimmers
for each projector from the lighting designer's inventory.
The second potential product that Cleveland envisioned was also for
controlling projectors directly from a lighting console, but in this case,

ing Senior Design Project on Computer Control of Technologies for the
Performing Arts" in the announcements for senior design projects
for the 2003-2004 academic year. The proposal attracted six engineers. Cleveland was able to recruit four upper-division theatre students. The team met in August 2003, and the project was under way.

The Marketing Group Defines a New Product
The theatre student's first task was to introduce the engineers to DMX
512 products, including making the actual serial connections to a light
board. The engineering team was assigned a Rosco Horizon lighting controller and a Wybron Forerunner color scroller and power supply to explore and test DMX512 signals, processing, and addressing.
Initially, the RAMBox staff envisioned a single "magic box" to cap-

PHOTO BY MATTHEW R. JOHNSON

PHOTO BY JOHN E. MAHAN

An improved PCBox prototype, fall 2004.

RAMBox Inc. "employees" demonstrate their products
for Miles Dudgeon from Rosco Laboratories (second
from left).

the projectors were the more current LCD (Liquid Crystal Display) and
DLP (Digital Light Projector) digital projectors. He had integrated digital
projectors into the designs for two dance works at CSU and he was sure
that more choreographers and directors would want to incorporate still
and moving projected images in their future projects.
In the multimedia dance theatre production of This Speaking Body
Cleveland had employed a pair of LCD projectors fed content by Windows
computers running PowerPoint to trigger a variety of cues composed of
the audio and video clips and still photos. (Cleveland 2003) Although the
production ran smoothly, two operators were required-one to trigger
each computer controlling its respective projector-and they needed to
coordinate executing cues with the light board operator. Cleveland was
convinced that DMX512, a standard control protocol for lighting equipment, was the logical choice as a control point to unify simultaneous
events on remote computers controlling the digital projectors. In essence, the challenge was to develop a means for a lighting console to
control a personal computer running any application program to trigger
events.
The final critical component for RAMBox Inc. was to field a team. In
the spring of 2003, Mahan posted "An Electrical and Computer Engineer-

34

THEATRE

DESIGN

&

TECHNOLOGY
SPRING

2006

ture and translate the DMX signal, with separate add-on devices for controlling a slide projector, a smoke machine, or slave PC. The management of RAMBox (the professors) set a goal for a product roll-out at the
College of Engineering's Engineering Days presentations in April, 2004,
and for the products to be tested under show conditions in the 2004
Spring Dance Concert.
Instead of developing a universal magic box with add-on components the engineering team found it more practical to build unique devices with different interfaces and physical connections for each type of
theatre hardware. Each device incorporated the same basic technology for
translating and processing the DMX512 signals (i.e. the microcontroller
and signal conditioning chips and their software code). The first semester of
the project closed with the engineers' progress report. The students reported
that they had learned the DMX512 structure and had identified design concepts and core technologies for developing prototypes for three devices.

Prototyping RAMBox Products
A field trip to a local manufacturer, Wybron, and a dealer, Barbizon Light
of the Rockies, ushered the RAMBox team into its second term. Wybron,



Table of Contents for the Digital Edition of Theatre Design & Technology - Spring 2006

Contents
Theatre Design & Technology - Spring 2006 - 1
Theatre Design & Technology - Spring 2006 - 2
Theatre Design & Technology - Spring 2006 - 3
Theatre Design & Technology - Spring 2006 - Contents
Theatre Design & Technology - Spring 2006 - 5
Theatre Design & Technology - Spring 2006 - 6
Theatre Design & Technology - Spring 2006 - 7
Theatre Design & Technology - Spring 2006 - 8
Theatre Design & Technology - Spring 2006 - 9
Theatre Design & Technology - Spring 2006 - 10
Theatre Design & Technology - Spring 2006 - 11
Theatre Design & Technology - Spring 2006 - 12
Theatre Design & Technology - Spring 2006 - 13
Theatre Design & Technology - Spring 2006 - 14
Theatre Design & Technology - Spring 2006 - 15
Theatre Design & Technology - Spring 2006 - 16
Theatre Design & Technology - Spring 2006 - 17
Theatre Design & Technology - Spring 2006 - 18
Theatre Design & Technology - Spring 2006 - 19
Theatre Design & Technology - Spring 2006 - 20
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