Highway Automatic Electronic Sign Board in the Nighttime

Published:2011/8/25 7:49:00 Author:Sue | Keyword: Highway, Automatic Electronic Sign Board, Nighttime | From:SeekIC

The picture shows the automatic electronic sign board circuit. When it is dark, the pilot light E3 will give out red light which indicates that there is danger. On the highway, when a car is near the dangerous area, the traffic sign which consists of pilot light E1,E2 will be displayed. At the same time, the pilot light E3,E4 will give out red and green flash light. When the car is away from the dangerous area, the pilot light E3 remains red, and the pilot light E1,E2 and E4 are off. The circuit consists mainly of acoustic control circuit, oscillating circuit and drive display circuit.



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