An interface for three-dimensional displays on a laboratory oscilloscope

A simple circuit which enables a classroom demonstration of any three-dimensional pattern to be shown on a laboratory cathode-ray oscilloscope is presented. After interfacing this circuit to any microprocessor kit or a small personal computer, programs are entered to show the patterns on the oscilloscope. Even fairly involved demonstration patterns, such as crystal planes, helix structures, and electromagnetic (EM) wave propagation require only simple machine-code programs of about a single page. Not only is the program generation for such patterns simple enough, it is easily understood and enables modifications to combine or vary the patterns. Methods of showing two-dimensional views, three-dimensional isometric views as well as alphanumerics are presented for implementing with a simple microprocessor kit, like the SDK 85