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Traffic light control for a complete intersection. Outputs 1 and 2 are green and red for direction A, outputs 4 and 5 are green and red for direction B. Output 3 is the amber for both but like the real thing, it overlaps with red when changing to green. If the input JP2 is switched to earth, the traffic lights switch to flashing amber. If the contact remains open, the traffic lights operate continuously.
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