Embedded Systems Introduction To Robotics Pdf =link=
Embedded Systems & Introduction to Robotics Chapter 1: What is an Embedded System? An Embedded System is a dedicated computer system designed to perform one or a few dedicated functions, often with real-time computing constraints. It is embedded as part of a complete device often including hardware and mechanical parts. 1.1 Key Characteristics
Task-specific: Unlike a PC, it runs a single program repeatedly. Resource-constrained: Limited memory (RAM/ROM), processing power, and energy. Real-time operation: Must respond to events within a strict timeframe. Embedded into a larger system: Invisible to the user (e.g., inside a microwave, car, or robot).
1.2 Core Components of an Embedded System | Component | Function | |-----------|----------| | Microcontroller (MCU) | CPU + RAM + ROM + I/O on one chip (e.g., Arduino, STM32, ESP32) | | Sensors | Convert physical parameters (light, temperature, distance) to electrical signals | | Actuators | Convert electrical signals into physical action (motor, solenoid, LED) | | Power Supply | Regulates voltage (e.g., 5V, 3.3V) for the system | | Communication Interface | UART, I2C, SPI, Bluetooth, Wi-Fi | 1.3 Embedded vs. General-Purpose Computer | Feature | Embedded System | PC/Laptop | |---------|----------------|------------| | OS | Often no OS or RTOS (Real-Time OS) | Windows/Linux/macOS | | User interface | Buttons, LEDs, simple display | Keyboard, mouse, monitor | | Power consumption | mW or µW | 10s of Watts | | Cost | $0.50 – $50 | $300+ |
Chapter 2: Introduction to Robotics Robotics is the interdisciplinary field that integrates mechanical engineering, electronics, and computer science to design, build, and program machines (robots) that can perform tasks autonomously or under remote control. 2.1 What is a Robot? A robot is a programmable, multifunctional manipulator designed to move materials, parts, tools, or specialized devices through variable programmed motions. In simpler terms: a robot senses, thinks, and acts. Embedded Systems Introduction To Robotics Pdf
Senses (inputs) → Sensors (IR, ultrasonic, camera) Thinks (processes) → Microcontroller, algorithm Acts (outputs) → Motors, grippers, speakers
2.2 Types of Robots (by application)
Industrial Robots: Welding, painting, assembly (e.g., robotic arms) Mobile Robots: Autonomous vehicles, drones, vacuum cleaners (Roomba) Service Robots: Medical, rehabilitation, delivery Educational Robots: LEGO Mindstorms, Arduino-based kits Embedded Systems & Introduction to Robotics Chapter 1:
Chapter 3: The Role of Embedded Systems in Robotics An embedded system is the brain of a robot. Without it, a robot is just a mechanical structure. 3.1 Typical Robot Embedded Architecture [Sensors] → [Microcontroller] → [Actuators] ↑ ↓ └───────[Feedback loop]────────┘
3.2 Common Microcontrollers for Robotics | Microcontroller | Best for | Typical Robot | |----------------|----------|----------------| | Arduino Uno (ATmega328P) | Beginners, learning | Line follower, obstacle avoider | | ESP32 | Wi-Fi/Bluetooth robots | Telepresence, IoT robot | | STM32 (ARM Cortex-M) | Industrial, precise control | Robotic arm, balancing robot | | Raspberry Pi (Linux) | Vision, complex AI | Autonomous car, drone | 3.3 Basic Robot Control Loop (in C-like pseudocode) void loop() { int distance = read_ultrasonic_sensor(); // Sense if (distance < 20) { // Think turn_left(); } else { move_forward(); } delay(50); // Act (repeat) }
Chapter 4: Essential Sensors & Actuators for Robotics 4.1 Sensors (Input devices) | Sensor | Detects | Typical use | |--------|---------|--------------| | Ultrasonic HC-SR04 | Distance (cm) | Obstacle avoidance | | IR sensor | Line (black/white) | Line following robot | | MPU6050 (IMU) | Acceleration, rotation | Self-balancing robot | | Camera (OV7670) | Images | Object tracking | 4.2 Actuators (Output devices) | 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 | 4.3 Motor Driver (H-Bridge) Microcontroller pins cannot supply enough current for motors. Use an H-Bridge (e.g., L298N, L293D) to control direction and speed. Arduino 5V → H-Bridge → DC Motor (9V) Embedded into a larger system: Invisible to the user (e
Chapter 5: Simple Robotics Project – Line Follower Robot This classic project demonstrates sensing, thinking, and acting. Hardware Required
2x IR sensor modules (digital output) Arduino Uno 2x DC geared motors + wheels Motor driver (L298N) Battery (7.4V–12V) Chassis
