Transcript 603 A DIGITAL PROGRAMMABLE ROBOT

603 A DIGITAL PROGRAMMABLE ROBOT
OVERVIEW:
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BASED ON CONCEPT OF PLC.
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IS PROGRAMMABLE USING A KEYPAD.
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POWERED BY A 9 VOLT BATTERY.
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INSTRUCTIONS CAN BE PROGRAMMED INTO MEMORY IN A
SEQUENCTIAL FASHION.
OPERATING FREQUENCY(SPEED) CAN BE VARIED USING A CLOCK
CIRCUIT.
HAS HARDWARE AND SOFTWARE RESET FACILITY.
BASIC COMPONENTS
THE PROGRAMMABLE ROBOT CONSISTS OF FOLLOWING BASIC
ELECTRONIC CIRCUITS:
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VOLTAGE REGULATOR
 TO PROVIDE +5 V DC POWER SUPPLY
 USES A ZENER DIODE FOR VOLTAGE REFERECE
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CLOCK GENERATION CIRCUIT
 USES ASTABLE MULTIVIBRATOR
 POTENTIOMETER IS USED TO CONTROL THE CLOCK RATE
 OPERATING FREQUENCY OF 603 A ROBOT IS 0.45/RC
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MEMORY LOAD SEQUENCER
 CONSISTS OF FLIP-FLOPS AND FEW GATES
 LOADS INPUTS FROM KEY PAD INTO MEMORY SEQUENCTIALLY
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RESET CONTROLLER AND CIRCUIT
 HAS TWO RESET CIRCUITS– MANUAL AND PROGRAMMABLE
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MEMORY CIRCUIT
 HEART OF THE PROGRAMMABLE ROBOT
 THE SIZE IS 256 WORD BY 4-BIT SRAM
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ADDRESS COUNTER
 USES A CMOS BINARY COUNTER IC
 CONTAINS 12 COUNTING STAGES OUTPUTTING FROM 0 TO 111111111111.
 ONLY 8 STAGES OF THE COUNTER ARE USED.
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AUDIO OSCILLATOR
 DESIGNED TO OPERATE AT A HIGHER FREQUENCY THAN THE CLOCK
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MOTOR DRIVE CIRCUIT
 HAS TWO IDENCITAL MOTOR DRIVE CIRCUITS- LEFT AND RIGHT
 CONSISTS OF ELCTRONIC SWITCHES
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LED INDICATOR CIRCUIT
 USED AS A WARNING TO INDICATE THE MAXIMUM NUMBER OF PROGRAM
INSTRUCTIONS.
 MEMORY CAN ALSO BE PROGRAMMED TO LIGHT THE LED
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KEY PAD
 USED TO PROGRAM INSTRUCTIONS INTO THE ROBOT’S MEMORY
 CONSISTS OF 5 SWITCHES AND TWO JUMPERS.
CIRCUIT DESCRIPTION
MECHANICS OF 603 A ROBOT
PERFORMS TWO BASIC TASKS
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TRANSFER POWER FROM THE MOTORS TO THE WHEELS
PROVIDE THE STEERING FUNCTION
TASKS ARE ACCOMPOLISHED BY A SERIES OF GEARS CALLED THE
DRIVE TRAINS.
MOTORS RUN WELL ONLY WHEN GEARS ARE TURINING AT A CERTAIN
SPEED.
A PROPER COMBINATION OF THE RIGHT KINDS OF GEARS IS A MUST
TO CONTROL THE SPEED AND PRODUCE THE REQUIRED TORQUE.
STEERING IS ACCOMPOLISHED BY OPERATING ONLY ONE MOTOR AT
A TIME.