6A H-Bridge Motor Control with Arduino

This project demonstrates how to control a DC motor using a 6A H-bridge and an Arduino, allowing direction reversal and speed control through PWM.

Requirements

• Arduino (Uno, Nano or similar)
• 6A H-bridge driver
• Compatible DC motor
• Power supply suitable for the motor
• Jumper wires and prototyping components

Connections

Component	Arduino Pin	Description
IN1	8	Direction input 1
IN2	9	Direction input 2
ENA (PWM)	10	Motor enable / Speed control
Vcc	5V	Logic supply
GND	GND	Ground reference

Motor power must be connected directly to the H-bridge, respecting the motor's current rating.

Usage

1. Connect the components according to the table above.
2. Upload Code/HBridgeControl.ino to your Arduino.
3. (Optional) Open the Serial Monitor for debugging.
4. The motor will alternate between forward and reverse rotations with programmed pauses.

Advanced control

For more flexibility, try Code/Code.ino. This sketch configures Timer1 for a 20 kHz PWM frequency and exposes helper functions to:

• Smoothly ramp speed in either direction
• Change PWM frequency at runtime
• Drive the motor using only two hardware PWM pins (OC1A/OC1B)

Use this version when you need finer control over switching frequency or wish to experiment with acceleration profiles.

Safety

• Use appropriate fuses to protect against short circuits.
• Avoid touching the H-bridge or motor while powered.
• Ensure the power supply can handle the motor's current draw.

Flowchart

flowchart TD
    A[Start] --> B[Configure pins]
    B --> C[Spin forward]
    C --> D[Delay 3s]
    D --> E[Stop motor]
    E --> F[Delay 1s]
    F --> G[Spin backward]
    G --> H[Delay 3s]
    H --> I[Stop motor]
    I --> J[Delay 1s]
    J --> C

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License

This project is licensed under the MIT License.