This document describes a traffic controller project using an 8085 microprocessor. The project uses LEDs connected to the 8085 via an 8255 PPI to control the lights for north, east, west, and south traffic. Software is used to control the traffic light sequence. The 8085 microprocessor is interfaced with the LEDs and 7-segment displays through I/O mapping on ports A and B of the 8255 PPI. Programming is done in RAM using assembly language on the 8085 microprocessor kit. The traffic controller provides a model for controlling red, green, and yellow lights without manual operation.

1. TRAFFIC
CONTROLLER
USING
MICROPROCESSOR 8085

3.  The project involves traffic control circuit
using 8085 microprocessor.
 Through software traffic of North-East-West-
South can be controlled
 In project traffic lights are LED’s,connected
to 8085 microprocessor with PPI
(Programmable Peripheral Interface) 8255 and
buffers.

4.  Here a model of traffic controller is prepared
that gives general idea about how Red, Green
and yellow lights can be controlled
 . It also helps to study the interfacing circuits
with 8085 microprocessor.
 8085 microprocessor can be mapped as
memory mapped and I/O mapped.

5.  This project involves study of I/O mapped
interfacing.
 In I/O mapping, I/P or O/P devices are
connected through 8255 PPI which has three
ports
 . In this project two ports are involved, to port
A indicating LEDs are connected and to port
B seven segments are connected.

6.  As 8085 microprocessor kit used,
programming is done in RAM and program is
in assembly language.

10. ADVANTAGE:
1.8085 SIMPLE PROCESSOR
2.TRAFFIC CONTROL USING WITHOUT MAN
3. IT IS AFFERT LESS.DUE TO INSTRUMENT.
4.IT IS LESS BULKY.

11. APPLICATION:
1.TRAFFIC SIGNAL CONTROLLING DIFFERENT PLACES.
2.WE ARE DONE MORE THAN ONE APPLICAYION USING
MICROPROCESSOR WITH SOFTWARE
.
3. LIKE TEMPERATURE CONTROLLER,BOILER
CONTROLLER,LEVEL CONTROLLER.ETC…..