Traffic Light Project

Traffic Light Project - Traffic Light Project 1 of 3

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Home | Map | Projects | Construction | Soldering | Study | Components | 555 | Symbols | FAQ | Links Traffic Light Project A kit for this project is available from RSH Electronics . Download PDF version of this page This project operates red, amber and green LEDs in the correct sequence for a single UK traffic light. The time sequence can be varied from about 7s to about 2½ 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 high), this saves using 5 diodes for red and simplifies the circuit. This project uses a
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This note was uploaded on 03/31/2012 for the course ECE 101 taught by Professor X during the Spring '12 term at Florida A&M.

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Traffic Light Project - Traffic Light Project 1 of 3

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