GnomeAVR - Robot Controller Board

Overview

GnomeAVR is a compact and powerful robot controller board built around the ATMega328P microcontroller. It is designed to control various robotic components including motors, servos, analog/digital sensors, and potentiometers.

• Input Voltage: 6V – 14V
• Motor Driver: TB6612FNG (Dual Channel, up to 3.2A per channel)
• Servo Control: Supports up to 4 PWM channels
• Analog Input: 8 channels (10-bit resolution via MCP3008)
• Digital Input: 8 channels (shared with analog)
• Knob/Potentiometer: Built-in for user input control

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📥 INPUT FUNCTIONS

🔢 Analog Input (8 Channels)

Reads analog value from channel (0-1023).

analog(int ch);

🔘 Digital Input (8 Channels)

Reads digital HIGH/LOW (1/0) from channel.

digital(int ch);

🎚️ Potentiometer (Knob)

• Raw Data (0-1023)

  knob();

• Scaled Range
  Map knob value to custom range.

  knob(int min, int max);

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📤 OUTPUT FUNCTIONS

🔄 Motor Control (2 Channels, up to 4 motors)

Direct Motor Control

Control motor speed directly.
Speed range: -100 (full reverse) to 100 (full forward).

motor(int ch, int speed);

Functional Motor Commands

• Move Forward (both motors same speed)

  fd(int speed);

• Move Forward (each motor independently)

  fd2(int speedA, int speedB);

• Move Backward (both motors same speed)

  bk(int speed);

• Move Backward (each motor independently)

  bk2(int speedA, int speedB);

Turning & Spinning

• Spin Left in place

  sl(int speed);

• Spin Right in place

  sr(int speed);

• Turn Left (curved path)

  tl(int speed);

• Turn Right (curved path)

  tr(int speed);

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🦾 Servo Motor Control

Control servo angle for up to 4 servos (0°–180°).

servo(int ch, int angle);

Example:

servo(0, 180);  // Set servo on channel 0 to 180°

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📘 Notes

• Ensure power supply matches motor and servo requirements.
• Motors are controlled via the TB6612FNG dual H-bridge driver.
• Analog and digital channels are shared but interpreted differently by function used.

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🧠 Ideal For

• Line-following robots
• Obstacle-avoidance bots
• Remote-controlled vehicles
• Educational robotics projects

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📞 Support

For questions or technical assistance, please contact the developer or check the documentation site.

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