Traffic Light | Engineering Mini Projects | Btech Project Ideas

Electronics and Communications Engineering Project Title “ Traffic Light ” is given with full details.This Project document may help you for “Mini Projects” or for generating newproject Ideas.

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ABSTRACT:

This project operates red, amber and green LEDs in the correct sequence for a single UK traffic light. The time taken for complete red-red & amber – green – amber sequence can be varied from about 7s to about 2 and 1/2 minutes by adjusting the 1M preset. Some amber LEDS emit light that is almost red so you may prefer to use a yellow LED. The 555 astable circuit provides clock pulses for the 4017 counter which has ten outputs (Q0 to Q9). Each output becomes high in turn as the clock pulses are received. Appropriate outputs are combined with diodes to supply the amber and green LEDs. The red LED is connected to the 10 output which is high for the first 5 counts (Q0-Q4), this saves using 5 diodes for red and simplifies the circuit.

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