LIGHT & DARKNESS CONTROL METHOD OF ELECTRIC LIGHT BOARD

摘要

This light and dark control system of an electric light board which shows a moving action, has a clock pulse generator that is organized by logic to generate the image pattern. The output signal of the time generator is selected by the 4-bit latch circuit and turns on the transistor through the resistor and the diods. The capacity of the time constant of the data stored in the 4-bit latch circuit is determined by the performance curve of the transistor base and the scanning time.