The use of the digital computer in engineering schools, with its ability to produce huge tables of results, soon causes the user to wonder if these results cannot be reduced to graphical form automatically. The equipment described here takes the numerical output of a digital computer on punched paper tape, converts the information on the tape to analog voltages, and uses these voltages to plot a point either on a common camera-equipped oscilloscope or on an available plotting table. Since the converter makes use of existing display equipment which every school has, uses low-cost relays, and works at a low speed, its cost is about $200, not including the tape reader. Complete details on design and construction are given.
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