603 A DIGITAL PROGRAMMABLE ROBOT OVERVIEW n BASED

603 A DIGITAL PROGRAMMABLE ROBOT OVERVIEW: n BASED ON CONCEPT OF PLC. n IS PROGRAMMABLE USING A KEYPAD. n POWERED BY A 9 VOLT BATTERY. n n n 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: n VOLTAGE REGULATOR w TO PROVIDE +5 V DC POWER SUPPLY w USES A ZENER DIODE FOR VOLTAGE REFERECE n CLOCK GENERATION CIRCUIT w USES ASTABLE MULTIVIBRATOR w POTENTIOMETER IS USED TO CONTROL THE CLOCK RATE w OPERATING FREQUENCY OF 603 A ROBOT IS 0. 45/RC n MEMORY LOAD SEQUENCER w CONSISTS OF FLIP-FLOPS AND FEW GATES w LOADS INPUTS FROM KEY PAD INTO MEMORY SEQUENCTIALLY n RESET CONTROLLER AND CIRCUIT w HAS TWO RESET CIRCUITS– MANUAL AND PROGRAMMABLE n MEMORY CIRCUIT w HEART OF THE PROGRAMMABLE ROBOT w THE SIZE IS 256 WORD BY 4 -BIT SRAM

n ADDRESS COUNTER w USES A CMOS BINARY COUNTER IC w CONTAINS 12 COUNTING STAGES OUTPUTTING FROM 0 TO 111111. w ONLY 8 STAGES OF THE COUNTER ARE USED. n AUDIO OSCILLATOR w DESIGNED TO OPERATE AT A HIGHER FREQUENCY THAN THE CLOCK n MOTOR DRIVE CIRCUIT w HAS TWO IDENCITAL MOTOR DRIVE CIRCUITS- LEFT AND RIGHT w CONSISTS OF ELCTRONIC SWITCHES n LED INDICATOR CIRCUIT w USED AS A WARNING TO INDICATE THE MAXIMUM NUMBER OF PROGRAM INSTRUCTIONS. w MEMORY CAN ALSO BE PROGRAMMED TO LIGHT THE LED n KEY PAD w USED TO PROGRAM INSTRUCTIONS INTO THE ROBOT’S MEMORY w CONSISTS OF 5 SWITCHES AND TWO JUMPERS.

CIRCUIT DESCRIPTION

MECHANICS OF 603 A ROBOT PERFORMS TWO BASIC TASKS n n 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.