General-Purpose Interface and Logic Experiment Devices

Abstract

A number of relatively inexpensive and versatile logic laboratory devices are commercially available in preassembled or “kit” forms. Most of these include, at a minimum, provisions for easy patchcord wiring of logic circuits, power supplies, a clock and two or more indicator lights and push buttons or switches. The price of such items is from $100 or less to well above $1,000. As one might expect, the more elaborate the system, the higher its cost. Because of the great variety of options available, a detailed list of specifications will not be included here. Rather, the minimal system will be described. This is adequate for performance of the digital logic experiments (Sec. I, Experiments 1–5 and Sec. II, Experiments 6 and 7), although the more elaborate (and more expensive) alternatives will certainly be equally suitable. One such device is the EL Instruments “Digi-designer.”