A hardware platform that contains a microcontroller or microprocessor along with supporting components required for prototyping embedded or IoT systems.
Includes:
- Integrated microcontroller or processor
- Built-in power regulation and clock circuitry
- I/O pins for sensors and actuators
- Communication interfaces (USB, UART, I²C, SPI, Wi-Fi, Bluetooth)
- Easy connection to a computer for programming
Advantages
- Reduced development time
- Reduced hardware complexity
- Lower prototyping cost
- Easy testing and debugging
- Large community support
Instead of designing custom electronics for each project, developers can prototype systems quickly using development boards and later move to specialized hardware for production.
Development boards simplify hardware design by providing a ready-to-use platform where developers can write, test, and debug programs without building circuits from scratch. They are widely used for rapid prototyping of IoT systems.
Components
Microcontroller or Microprocessor
The central computing unit that executes the program and controls peripherals.
Memory
Memory stores program code and runtime data.
- Flash memory – program storage
- SRAM – temporary data storage
- EEPROM – non-volatile storage
Input/Output Interfaces
Pins and ports used to connect sensors, actuators, and other electronic components.
Types:
- Digital I/O pins
- Analog input pins
- PWM output pins
Communication Interfaces
Interfaces that allow the board to communicate with other devices or networks.
Examples:
- UART (Serial communication)
- SPI (Serial Peripheral Interface)
- I²C (Inter-Integrated Circuit)
- Wi-Fi
- Bluetooth
- Ethernet
Power Management
Power circuits regulate voltage and supply power to the board and connected devices.
Development board includes voltage regulators, USB power input and battery support
Programming and Debugging Interface
Interfaces used to upload programs and debug the device.
Examples:
- USB programming interface
- In-Circuit Serial Programming (ICSP)
- Debugging ports
Examples
Arduino
A popular microcontroller development board used for prototyping and by beginners. Contains an ATmega328 microcontroller and supports various I/O interfaces.
Has:
- Digital I/O pins
- Analog input pins
- PWM outputs
- I²C communication pins (SCL/SDA)
- USB interface for programming
- Power supply pins (5V, 3.3V, GND)
Has a large ecosystem of compatible sensors, shields, and libraries that simplify development.
ESP8266 / ESP32
Another popular microcontroller developer board. Has built-in wireless connectivity. More powerful microcontroller compared to ATmega328.
Used in smart home devices, wireless sensors.