Mine-site indicating lights circuit

Published:2011/5/15 3:23:00 Author:John | Keyword: indicator | From:SeekIC

The lights installed in the mining sites are used to help drivers to notice the situation behind the car and to avoid accidents. Phototransistor is used as optical signal sensor. When the light shines on the photodiodes, the relay J picks up. A pair of normally opened contact closes. The green light starts to shine, indicating that there is no obstacle behind the car. If there is any obstacle blocking the light , the relay J does not picks up and the red light shines.



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