In the world of microcontrollers, the Digispark ATtiny85 stands out as a compact, versatile, and affordable option for hobbyists and engineers alike. Despite its small size, it packs a powerful punch with a range of features that make it an excellent choice for a variety of projects. This blog post will delve into the capabilities of the Digispark ATtiny85, its applications, and how you can get started with this remarkable microcontroller.
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What is the Digispark ATtiny85?
The Digispark ATtiny85 is a small development board that is based on the ATtiny85 microcontroller from Atmel (now part of Microchip Technology). The ATtiny85 is an 8-bit microcontroller with 8 KB of Flash memory, 512 bytes of SRAM, and 256 bytes of EEPROM. It operates at a clock speed of 8 MHz and has 6 I/O pins that can be used for various functions, including digital input/output, analog input, and pulse-width modulation (PWM).

The Digispark board is designed to be a more accessible and user-friendly version of the ATtiny85 microcontroller. It comes with a USB interface for easy programming and can be used to create a wide range of electronics projects. Its small size and low cost make it an attractive choice for many DIY electronics enthusiasts and makers.
Key Features of the Digispark ATtiny85
- Compact Size: The Digispark ATtiny85 is incredibly small, measuring just 1.2 inches by 0.6 inches (30 mm by 15 mm). This compact size allows it to fit into projects where space is a constraint.
- USB Interface: One of the standout features of the Digispark is its built-in USB interface. This allows the board to be programmed directly from a computer without the need for additional hardware like a programmer or an external USB-to-serial adapter.
- Versatile I/O Pins: The board features 6 I/O pins, which can be configured for various functions such as digital input/output, analog input, and PWM. This versatility enables users to create a wide range of projects, from simple LED blinkers to more complex sensor-based systems.
- Built-in LEDs: The Digispark board comes with a built-in LED on pin 1, which can be used for debugging or visual feedback. This is particularly useful for testing and troubleshooting during development.
- Low Power Consumption: The ATtiny85 microcontroller is known for its low power consumption, making it ideal for battery-operated projects. It offers several power-saving modes that can extend the battery life of your projects.
- Affordable: The Digispark ATtiny85 is one of the most cost-effective microcontroller development boards available. This affordability makes it an excellent choice for hobbyists and students who are just getting started with electronics.
Getting Started with the Digispark ATtiny85
Getting started with the Digispark ATtiny85 is relatively straightforward, thanks to its user-friendly design and the availability of resources and libraries. Here’s a step-by-step guide to help you begin:
- Install the Arduino IDE: The Digispark ATtiny85 can be programmed using the Arduino IDE, which is a popular and widely used platform for developing and uploading code to microcontrollers. Download and install the Arduino IDE from the official Arduino website.
- Install the Digispark Board Support Package: To program the Digispark ATtiny85 using the Arduino IDE, you need to install the Digispark board support package. Open the Arduino IDE, go to “File” > “Preferences,” and in the “Additional Boards Manager URLs” field, enter the following URL:
http://digistump.com/package_digistump_index.json
. Then, go to “Tools” > “Board” > “Boards Manager,” search for “Digispark,” and install the Digispark board package. - Select the Digispark Board: Once the board package is installed, select the Digispark board from the “Tools” > “Board” menu. Choose “Digispark (Default – 16.5mhz)” for the standard configuration.
- Write Your Code: Write your Arduino sketch (code) using the Arduino IDE. The Digispark ATtiny85 is compatible with most Arduino functions, making it easy to get started with familiar code examples.
- Upload Your Code: Connect the Digispark board to your computer using a USB cable. The first time you upload code, you may need to press the “Reset” button on the board to put it into programming mode. Click the “Upload” button in the Arduino IDE to compile and upload your code to the Digispark.
- Test Your Project: Once the upload is complete, your code will start running on the Digispark ATtiny85. Test your project to ensure it works as expected. If you encounter any issues, check your connections and code for errors.
Applications of the Digispark ATtiny85
The Digispark ATtiny85 is a versatile microcontroller that can be used in a wide range of applications. Here are a few examples of projects you can create using the Digispark:
- LED Blinkers: A classic beginner project is to create an LED blinker. Use the Digispark to control an LED, making it blink on and off at a specified interval. This project is a great way to get familiar with basic programming and I/O functions.
- Sensor-Based Projects: The Digispark can be used with various sensors, such as temperature sensors, light sensors, and motion detectors. Create projects that monitor environmental conditions and respond to changes based on sensor input.
- Wireless Communication: Add wireless communication capabilities to your projects using modules like the NRF24L01 or Bluetooth. The Digispark can be used to send and receive data wirelessly, enabling applications such as remote control systems and data logging.
- Custom Keyboards and Controllers: The USB interface on the Digispark makes it possible to create custom keyboards, game controllers, or other USB devices. Program the Digispark to emulate keyboard inputs or control functions in a computer application.
- IoT Devices: Incorporate the Digispark into Internet of Things (IoT) projects by connecting it to Wi-Fi or other communication modules. Create devices that can send data to the cloud, receive commands from a remote server, or interact with other IoT devices.
Tips and Tricks for Working with the Digispark ATtiny85
- Use External Power: While the Digispark can be powered via USB, some projects may require more power than the USB port can provide. Consider using an external power source if your project requires higher current.
- Optimize Code: The ATtiny85 has limited memory and processing power, so it’s essential to write efficient code. Optimize your sketches by minimizing memory usage and avoiding unnecessary operations.
- Check for Library Compatibility: Not all Arduino libraries are compatible with the ATtiny85 due to its limited resources. Check library documentation and test compatibility before using them in your projects.
- Be Mindful of Timing: The Digispark operates at 8 MHz by default, which can affect timing functions. Use appropriate timing functions and libraries to ensure accurate timing in your projects.
- Explore Community Resources: The Digispark community is active and supportive. Explore online forums, tutorials, and project examples to gain insights and inspiration for your projects.
Conclusion
The Digispark ATtiny85 is a small but mighty microcontroller that offers a wealth of possibilities for electronics enthusiasts and developers. Its compact size, USB interface, and versatility make it an excellent choice for a wide range of projects. By getting started with the Digispark, you can explore the world of microcontrollers, create innovative projects, and develop valuable skills in electronics and programming.
Whether you’re a beginner or an experienced maker, the Digispark ATtiny85 provides a powerful platform for experimentation and creativity. Embrace its potential, and let your imagination guide you as you embark on your next electronics adventure with the Digispark ATtiny85.