Many beginners make the mistake of assuming robotics is purely about mechanical engineering or high-level AI. In reality, the "brain" of any robot—from a simple line-follower to a six-axis industrial arm—is an embedded system.

| | Content Source | Hands-On Lab | | :--- | :--- | :--- | | Chapter 1: Voltage & Logic | Sparkfun/Adafruit tutorials | Measure voltage with a multimeter | | Chapter 2: LED Blink (The "Hello World") | Arduino IDE built-in examples | Blink LED without delay() | | Chapter 3: Reading Switches | Technical documentation | Debounce a button in software | | Chapter 4: Motor Control | L298N Datasheet | Build a differential drive robot | | Chapter 5: Sensor Fusion | Madgwick filter paper | Combine Accelerometer + Gyro |

: The microcontroller uses the firmware to make decisions based on that data.

like FreeRTOS or Zephyr. These systems ensure that critical tasks are prioritized and completed within strict time windows, providing the determinism necessary for safe autonomous operation. Integration of Hardware and Software

At the core of any robotic system lies a microcontroller or microprocessor. Unlike general-purpose computers, robotic embedded systems are optimized for efficiency and reliability. They must simultaneously manage: Sensor Fusion:

| Actuator | Control | Example | |----------|---------|---------| | DC motor | Speed (PWM) | Wheel drive | | Servo motor | Position (0°–180°) | Robotic arm joint | | Stepper motor | Precise rotation (steps) | 3D printer, CNC | | Relay/Solenoid | On/Off | Gripper clamp |

Microcontroller pins cannot supply enough current for motors. Use an (e.g., L298N, L293D) to control direction and speed.