603 A DIGITAL PROGRAMMABLE ROBOT OVERVIEW: BASED ON CONCEPT OF PLC. IS PROGRAMMABLE USING A KEYPAD. POWERED BY A 9 VOLT BATTERY. 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: VOLTAGE REGULATOR  TO PROVIDE +5 V DC POWER SUPPLY  USES A ZENER DIODE FOR VOLTAGE REFERECE CLOCK GENERATION CIRCUIT  USES ASTABLE MULTIVIBRATOR  POTENTIOMETER IS USED TO CONTROL THE CLOCK RATE  OPERATING FREQUENCY OF 603 A ROBOT IS 0.45/RC MEMORY LOAD SEQUENCER  CONSISTS OF FLIP-FLOPS AND FEW GATES  LOADS INPUTS FROM KEY PAD INTO MEMORY SEQUENCTIALLY RESET CONTROLLER AND CIRCUIT  HAS TWO RESET CIRCUITS– MANUAL AND PROGRAMMABLE MEMORY CIRCUIT  HEART OF THE PROGRAMMABLE ROBOT  THE SIZE IS 256 WORD BY 4-BIT SRAM

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