digiscope

For examining pulse trains in digital circuits an oscilloscope is an invaluable aid. However, oscilloscopes are expensive, and furthermore the analogue display capability of a conventional `scope is rarely required in digital circuits, since only two voltage states, corresponding to logic 0 and 1, are encountered. The Digiscope offers a low-cost alternative to the conventional oscilloscope for digital work, and displays digital pulse trains on two rows of light-emitting diodes.