Traffic Light Controller

abstr operation This project operates wild, gold and green straighten outly-emitting diodes in the sort out secern for a single UK traffic light up. The age taken for the collar red - red & amber - green - amber sequence canful be vary from almost 7s to about 2½ seconds by adjusting the 1M preset. most amber LEDs transmit light that is almost red so you may favour to use a yellow LED. The 555 astable rotary provides clock pulses for the 4017 antagonistic which has ten turnouts (Q0 to Q9). Each output becomes spunky in wrench as the clock pulses are received. separate outputs are combine with diodes to supply the amber and green LEDs. The red LED is committed to the ÷10 output which is high for the first-class honours degree 5 counts (Q0-Q4 high), this saves victimization 5 diodes for red and simplifies the circuit. circuit plat description This circuit simulates the trading Lights. The Red, Yellow and Green LEDs lights nonpareil by one for a p eriod of 1 minute and the daily round repeats just wish the Traffic lights. IC1 (NE555) is the democratic timer IC wired in the Astable Multivibrator mode. Resistors R1, R2 and capacitor C1 act as the timing subdivisions and the output pulses are available from the output ensnare 3 of IC1. These pulses are given to the input ensnare 14 of the Johnson decade counter IC CD4017. Out of the 10 outputs of IC2, only three outputs are apply to drive the LEDs.

The twenty-five percent output pin 4 is attached to the reset pin 15 to stop the counting. So that the cycle repeats. With the repute of C1, from each one LED remains on for 1 minute. When one LED tu! rns off, the second on turns on. This cycle repeats magnanimous the Traffic light appearance. Resistor R3 keeps the input pin 14 of IC2 low after each pulse. Note - If LEDs are connected to all outputs, and the value of R1 and R2 is reduced to 100 K, a cart track light can be constructed. If R1 is replaced with 1M Preset, the speed of the running light can be adjusted. Reset pin 15 should be grounded. Fig1: tour of duty diagram of Traffic light controller working of component separate Required...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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