Interfacing of dc motor with 8051 micro controller ,L293D

Interfacing of dc motor with 8051 micro controller. How the dc motor is interfacing with microcontroller by using L293D driver IC

1. PRESENTED BY, MANIKANDAN K 18EIR041 MPMC LABOURATORY 09.12.2020 INTERFACING OF DC MOTOR

2. INTERFACING OF DC MOTOR AIM: To develop Embedded C programming to interface 8051 microcontroller with DC motor APPA RATUS REQUIRED S.No Item Specification Quantity 1 Microcontroller 8051 1 2 L293D motor driver - 1 3 DC Motor 12V 1 4 Oscillator crystal 12MHz 1 5 Power supply 5V 1 6 Capacitors 33pF, 10 μ F 2,1 7 Resistor 330k Ω 2 8 Software: Keil μ Vision 5 - - 9 Software: Proteus 8 - -

3. DC MOTOR A motor translates electrical pulses into mechanical motion DC motor works on DC power Magnitude F=B*l*v It follows Lorentz law and Faradays law of electromagnetic induction principle Typical Operating voltages are 6V, 12V or 24V DC motors are bidirectional. We can control DC motor diection by using H-Bridge concept Principle: “When a current carrying conductor is placed in a magnetic and electric field, the conductor experiences force” and the force is the Lorentz force.

4. H-BRIDGE CONFIGURATION : High Left High Right Low Left Low Right Description ON OFF OFF ON Motor runs clockwise OFF ON ON OFF0 Motor runs anti-clockwise ON ON OFF OFF Motor stops OFF OFF ON ON Motor stops TRUTH TABLE OF H-BRIDGE CONFIGURATION

5. NEED OF DRIVER CIRCUITRY The power requirements of most of DC motor is higher Back emf produced by the motor may damage the microcontroller L293D is a motor driver IC. Supply voltage between 4.5 to 36V with maximum current of 600mA 16 pin H-Bridge driver IC Can drive two DC motors IN1,IN2- Control signals for M1, OUT1,OUT2-M1 connected EN1- enables M1 IN3,IN4- Control signals for M2, OUT3,OUT4-M2 connected EN2- enables M2 VSS- Supply of IC VS- Supply of motor L293D PIN CONFIGURE

6. CIRCUIT DIAGRAM:

7. EMBEDDED C CODE: #include<reg52.h> #include<stdio.h> void delay(void); sbit motor_pin_1 = P2^0; sbit motor_pin_2 = P2^1; void main() { do { motor_pin_1 = 1; motor_pin_2 = 0; //Rotates Motor Anti Clockwise delay(); motor_pin_1 = 1; motor_pin_2 = 1; //Stops Motor delay(); motor_pin_1 = 0; motor_pin_2 = 1; //Rotates Motor Clockwise delay(); motor_pin_1 = 0; motor_pin_2 = 0; //Stops Motor delay(); }while(1); } void delay() { int i,j ; for ( i =0;i<1000;i++) { for (j=0;j<1000;j++) { } } }

8. PROCEDURE

9. RESULT Thus, Embedded C programming to interface 8051 microcontroller with DC motor was developed and output was verified successfully