PROGRESS REPORT PRESENTATIONBY

OGUNNIYI ADENIYI .L.EEG/2010/079

ONAUTOMATIC GATE OPENER WITH CODE LOCK

supervised by:Dr. S.A. Adeniran

DEPARTMENT OF ELECTRONIC AND ELECTRICAL ENGINEERING

OBAFEMI AWOLOWO UNIVERSITYILE-IFE, OSUN STATE.

DECEMBER, 2014

THE PROJECT IS BUILT TO BEHAVE IN THE SAME WAY AS A CLOSED LOOP SYSTEM.

THE INPUT IS THE CODE ENTERED

THE MICROPROCESSOR, IC AND DC MOTOR CONSTITUTE THE INTERMEDIATE STAGE.

THE ACTUAL MOVEMENT OF THE GATE IS THE OUTPUT.

THE LIMIT SWITCH SERVE AS THE FEEDBACK.

INTRODUCTION

THE ARDUINO MACHINE LANGUAGE IS

USED AS THE COMPILER LANGUAGE FOR THE MICROPROCESSOR.

THE ATMega324P MICROCONTROLLER CAN SOURCE OR SINK CURRENT UPTO 40mA, HENCE THE NEED FOR A MOTOR DRIVER.

OPERATING VOLTAGE OF THE DC MOTOR MAY BE MUCH HIGHER THAN OPERATING VOLTAGE OF THE MICROCONTROLLER.

FEATURES OF THE AUTOMATIC GATE OPENER

THE 4*3 NUMERICAL KEYPAD INPUT. THE ATMega324P MICROCONTROLLER THE H-BRIDGE L293D IC MOTOR DRIVER THE RELAY TIMER THE LIMIT SWITCH THE DC MOTOR POWER SUPPLY UNIT THE 16*2 LCD DISPLAY ARDUINO MACHINE LANGUAGE

LIST OF COMPONENTS

LCD DISPLAY SCHEMATIC

ICL239D CIRCUIT

ATMega324P & ITS

INTERCONNECTION

THE STEPS BELOW OUTLINE THE MAJOR

PROCESSES FROM THE POINT OF CODE ENTRY TO THE OPENING OF THE GATE :

THE FIRST MAIN PART OF CIRCUIT IS THE INPUT CODE LOCK INTERFACE WHICH ENABLES THE CODE INPUT TO BE ENTERED FOR AUTHORISATION AND ACCESS TO BE GRANTED TO THE OPERATOR. IT IS INTERCONNECTED TO A MICROCONTROLLER.

WORKING PRINCIPLE

THE ATMEGA328P MICROCONTROLLER HELPS TO

INTERPRET THE INPUT DATA BEFORE GIVING AUTHORISATION TO THE USER .

SENDS A BINARY SIGNAL IN THE FORM OF HIGH’S AND LOW’S TO THE INPUT OF THE IC L293 WHICH DRIVES THE DC STEPPER MOTOR IN ONE DIRECTION OR THE OTHER EXPLAINING THE PRINCIPLE OF OPENING AND CLOSING OF THE GATE.

WORKING PRINCIPLE

THE LIMIT SWITCH POSITIONED AT TWO

EXTREME POINT ENABLES A FEEDBACK TO BE SENT THROUGH THE MICROCONTROLLER TO THE IC L293D WHICH INTURNS REVERSE THE POLARITY OF THE DC MOTOR AND THE GATE RESPOND AFTER A PRESET TIME(IN SECONDS) BY CLOSING AUTOMATICALLY.

.

WORKING PRINCIPLE

THE PROJECT IS OF GOOD VALUE TO

RESIDENTIAL HOUSES AND SMALL OFFICES MAINLY.

THE COMPONENT USED IN THE PROJECT MAKES THE PROJECT TO BE COST-EFFECTIVE AND EFFICIENT.

TO COUNTER THE EFFECT OF BACK E.M.F OUTPUT DIODES ARE INCLUDED WITHIN THE IC.

CONCLUSIONS

THANK YOU FOR LISTENING