DC Motor Control Project

This project demonstrates how to control a DC motor using an ATmega32 microcontroller and an L298 motor driver. The project allows for controlling the speed and direction of the motor using a potentiometer and push buttons.

Components Used

• ATmega32 Microcontroller
• L298 Motor Driver
• DC Motor
• Potentiometer (1kΩ)
• Push Buttons (3x)
• Resistors (10kΩ x 3)
• Diodes (1N4001 x 4)
• Capacitor (100nF)
• Power Supply (12V)

Schematic

The schematic above shows the connections between the components. Here's a breakdown of the connections:

1. Microcontroller (ATmega32):

   • Pins PA0-PA7: General Purpose I/O
   • Pins PB0-PB7: General Purpose I/O
   • Pins PC0-PC7: General Purpose I/O
   • Pins PD0-PD7: General Purpose I/O
   • Pin 9: RESET
   • Pins 12, 13: XTAL1, XTAL2 (for external crystal)
   • Pins 30, 32: AVCC, AREF (Analog Reference)
   • Pin 31: GND

2. Motor Driver (L298):

   • Pins 1, 15: IN1, IN2 (connected to PD6, PD7 of ATmega32)
   • Pins 2, 3, 13, 14: OUT1, OUT2, OUT3, OUT4 (connected to the motor)
   • Pins 4, 12: VSS, VS (connected to 12V power supply)
   • Pins 8, 15: GND, ENA, ENB (connected to ground and control signals)
   • Pins 6, 11: SENSEA, SENSEB (connected to ground)

3. Potentiometer (RV1):

   • Connected to PA0 for reading speed control

4. Push Buttons:

   • Right: Connected to PD0
   • Left: Connected to PD1
   • Step: Connected to PD2

5. Resistors:

   • Pull-down resistors (10kΩ) for the push buttons

6. Diodes (1N4001):

   • Protection diodes for the motor driver

7. Capacitor (100nF):

   • For noise filtering across the motor terminals

Usage

1. Speed Control: Adjust the potentiometer (RV1) to control the speed of the DC motor.
2. Direction Control: Use the push buttons to control the direction of the motor:
   • Right Button: Rotate the motor to the right
   • Left Button: Rotate the motor to the left
   • Step Button: Step control for precise movements

How to Run

1. Circuit Assembly: Assemble the circuit as per the schematic provided above.
2. Programming: Upload the DC Motor Control.c code to the ATmega32 microcontroller using an appropriate programmer.
3. Power Up: Connect the 12V power supply to the circuit.
4. Operation: Use the potentiometer and push buttons to control the motor.

Code

The source code for this project can be found in the DC Motor Control.c file. It handles the reading of inputs from the potentiometer and push buttons, and controls the motor via the L298 motor driver.

Authors

• Sayyed Hossein Hosseini
• Reza Aalaei

License

This project is licensed under the MIT License.