# open source microcontroller
**Wikidata**: [Q56194833](https://www.wikidata.org/wiki/Q56194833)  
**Source**: https://4ort.xyz/entity/open-source-microcontroller

## Summary
An open source microcontroller is a small computer on a single integrated circuit whose design documents are openly accessible and modifiable by others. It combines the functionality of a microcontroller with the collaborative, transparent principles of open hardware, enabling customization and community-driven development.

## Key Facts
- Open source microcontrollers are a subclass of both **microcontrollers** and **open hardware**.
- Examples include **Arduino/Genuino 101**, **Arduino/Genuino Zero**, **Arduino Esplora**, **Arduino Micro**, **Netduino**, **Arduino Mini**, and **Arduino Leonardo**.
- **Arduino** is a prominent Italian open-source hardware and software company associated with many of these microcontrollers.
- **Arduino Esplora** is a specialized board with built-in human interface elements (e.g., joystick, buttons, sliders).
- **Netduino** is an open-source electronics prototyping platform based on the .NET framework.
- These microcontrollers are widely used in prototyping, education, and DIY electronics projects.

## FAQs
### Q: What is an open source microcontroller?
A: It is a microcontroller whose design files (schematics, firmware, etc.) are publicly available, allowing users to study, modify, and distribute them. Examples include Arduino boards and Netduino.

### Q: What are some popular open source microcontrollers?
A: Notable examples include **Arduino Leonardo**, **Arduino Micro**, **Arduino Esplora**, and **Netduino**, all of which are widely used in hobbyist and professional projects.

### Q: How does an open source microcontroller differ from a proprietary one?
A: Open source microcontrollers provide full access to their design files, enabling customization and community improvements, whereas proprietary microcontrollers restrict access to their internal workings.

### Q: What is Arduino’s role in open source microcontrollers?
A: Arduino is a leading company in the open-source hardware movement, producing widely used microcontroller boards like the **Arduino Leonardo** and **Arduino Esplora**.

### Q: Can open source microcontrollers be used for commercial products?
A: Yes, many open source microcontrollers (e.g., Arduino-based boards) are used in commercial products, though licensing terms (e.g., Creative Commons, GPL) must be followed.

## Why It Matters
Open source microcontrollers democratize access to embedded computing by providing affordable, customizable, and well-documented hardware. They lower the barrier to entry for electronics prototyping, enabling students, hobbyists, and engineers to develop innovative projects without proprietary restrictions. By fostering collaboration, these platforms accelerate innovation in fields like IoT, robotics, and automation. The transparency of open hardware also enhances security and trust, as users can audit and modify designs. Additionally, the educational value of open source microcontrollers is immense, as they serve as practical tools for teaching programming, electronics, and system design in schools and maker communities worldwide.

## Notable For
- **Community-driven development**: Designs are openly shared, allowing global collaboration and rapid iteration.
- **Educational adoption**: Widely used in schools and universities for teaching electronics and programming.
- **Modularity and customization**: Users can adapt hardware and software to specific needs, unlike closed systems.
- **Affordability**: Open designs often reduce costs compared to proprietary alternatives.
- **Ecosystem support**: Large communities (e.g., Arduino) provide extensive libraries, tutorials, and forums.

## Body
### Definition and Classification
An **open source microcontroller** is a type of **microcontroller** (a small computer on a single integrated circuit) that adheres to **open hardware** principles. This means its design files—including schematics, PCB layouts, and firmware—are publicly accessible and modifiable under open licenses.

### Key Examples
- **Arduino/Genuino 101**: A single-board computer with Intel Curie module, Bluetooth LE, and a 6-axis accelerometer/gyroscope.
- **Arduino/Genuino Zero**: Features a 32-bit ARM Cortex-M0+ processor, designed for low-power applications.
- **Arduino Esplora**: A derivative board with built-in sensors (joystick, temperature sensor, microphone) and actuators (buzzer, RGB LED).
- **Arduino Micro**: A compact board based on the ATmega32U4, with native USB support.
- **Netduino**: An open-source platform compatible with .NET Micro Framework, offering a familiar development environment for C# programmers.
- **Arduino Leonardo**: Uses the ATmega32U4 and includes built-in USB communication, eliminating the need for a secondary processor.
- **Arduino Mini**: A smaller, breadboard-friendly version of Arduino with reduced I/O pins.

### Relationship to Arduino
The **Arduino** ecosystem is a major driver of open source microcontrollers. Founded in Italy, Arduino provides both hardware (e.g., boards) and software (e.g., Arduino IDE) under open licenses. Many of its products, such as the **Leonardo** and **Esplora**, are designed for specific use cases, from general prototyping to interactive projects.

### Applications
Open source microcontrollers are used in:
- **Education**: Teaching coding and electronics in classrooms.
- **Prototyping**: Rapid development of IoT devices, robots, and sensors.
- **DIY Projects**: Home automation, wearable tech, and artistic installations.
- **Research**: Low-cost platforms for experimental setups.

### Licensing and Open Hardware
Most open source microcontrollers use licenses like **Creative Commons (CC-BY-SA)** or **GPL**, ensuring that modifications and derivatives remain open. This contrasts with proprietary microcontrollers, where designs are typically closed and controlled by manufacturers.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "open source microcontroller",
  "description": "A microcontroller whose design documents are openly accessible and modifiable, combining embedded computing with open hardware principles.",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q2095",
    "https://en.wikipedia.org/wiki/Open-source_hardware"
  ],
  "additionalType": [
    "https://www.wikidata.org/wiki/Q189480"  // microcontroller
  ]
}