LINE FOLLOWER PART 2: MOTOR DRIVER
Coming to the second part of our discussion and thats the motor driver. So the motor driver is basically an electronic circuit that drives/control the motor by controlling the voltage across the terminal. It can move the motor(DC motors) back and forth with a variable speed range.
TYPES OF MOTOR DRIVER
1. L293D BASED
* It is cheaper,lesser components, does not require a heat sink.
Description
* 600mA OUTPUT CURRENT CAPABILITY PER CHANNEL
* 1.2A PEAK OUTPUT CURRENT (non repetitive) PER
* CHANNEL ENABLE FACILITY
* OVER TEMPERATURE PROTECTION
* LOGICAL "0" INPUT VOLTAGE UP TO 1.5 V (HIGH NOISE IMMUNITY)
2.L298D BASED
* Its comparatively costlier,needs heat sink, more current carrying capacity.
Description
Similar action can be used for motor B.
Coming to the second part of our discussion and thats the motor driver. So the motor driver is basically an electronic circuit that drives/control the motor by controlling the voltage across the terminal. It can move the motor(DC motors) back and forth with a variable speed range.
TYPES OF MOTOR DRIVER
1. L293D BASED
* It is cheaper,lesser components, does not require a heat sink.Description
* 600mA OUTPUT CURRENT CAPABILITY PER CHANNEL
* 1.2A PEAK OUTPUT CURRENT (non repetitive) PER
* CHANNEL ENABLE FACILITY
* OVER TEMPERATURE PROTECTION
* LOGICAL "0" INPUT VOLTAGE UP TO 1.5 V (HIGH NOISE IMMUNITY)
2.L298D BASED
Description
The LN298 is a high voltage, high current, dual full-bridge motor driver designed to accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC and stepping motors.
- Operating supply voltage of up to 46V
- 4.5-7VDC logic supply voltage
- Total DC current of up to 4A
- Over-temperature protection
- Logical ‘0’ input up to 1.5V (high-noise immunity)
PINS LAYOUT IN MOTOR DRIVERS
Power pins- through which power is feeded in. These are VCC+ and GND- . 12V input is given to it.
Motor outputs pins- outputs to the motors are given through this.
ENA, ENB(enable A,B) - It works as enable to circuit and also speed control for the motors. It regulates the voltage from 0-12V with logical signal of 0-5V input from arduino.
Pins A1,A2 and B1,B2- these and used for controlling the direction of the motor.
A1
|
A2
|
ACTION
|
LOW
|
LOW
|
NO ACTION
|
LOW
|
HIGH
|
FORWARD
|
HIGH
|
LOW
|
BACKWARD
|
HIGH
|
HIGH
|
STOP
|
Similar action can be used for motor B.
CHOICE OF MOTOR
 |
| BO MOTOR STRAIGHT |
 |
| BO MOTOR L-SHAPED |
Centre shaft DC geared motor or plastic motor (B.O.motor) works fine with line follower.
THANK YOU FOR READING THE BLOG.....