Digispark Attiny167 Development Board (Pro Compatible)

Features

• Compatibility: Works with Arduino IDE 1.5+ on OSX, Windows, and Linux.

• Easy Installation: Fully signed drivers and executable installer.

• USB Support:

  • USB programming

  • USB device emulation

  • USB-CDC virtual serial port emulation

• Clock: 16 MHz precision crystal oscillator.

• Memory: 16KB Flash (approx. 14.5KB available after bootloader).

• Serial Communication: USB-based communication for debugging and data transfer.

• I/O Pins: 14 total, including 2 shared with USB.

• Interfaces:

  • I2C

  • SPI

  • UART

  • LIN

  • USI

• ADC: 10 pins support analog-to-digital conversion.

• PWM: 3 assignable PWM channels.

• Power Supply:

  • USB or external (5V or 6–16V input)

  • 150mA 5V built-in regulator

• Reset/User Button: Can be repurposed as an I/O pin.

• LEDs:

  • Power LED

  • Test/Status LED (Pin 1)

• Power Management: Solder jumpers to disable power-hungry features.

• Mounting: Two mounting holes for secure installation.

• Breadboard Friendly: Compact design with appropriate spacing (three side header pins for legacy shield support).

Description

This Micro USB-enabled development board is fully Arduino-compatible (ATTiny167) and eliminates the need for a USB-to-Serial converter. With 14 digital I/O and 10 analog ADCs, it supports:

• Digispark shield ecosystem (25+ shields)

• Enhanced pinout

• Expanded memory

• Native USB

• Additional features like Wi-Fi and Bluetooth compatibility

Principle of Work

1. Microcontroller (MCU): Based on ATTiny167, containing CPU, memory, and I/O interfaces.

2. Open Hardware: Public design encourages compatibility and custom implementations.

3. Arduino-Compatible: Works seamlessly with Arduino libraries and tools.

4. Micro USB: Direct computer connection without extra hardware.

5. Bootloader & V-BUS Library: Manages USB communication and code uploading.

6. Arduino IDE: Used for programming, compiling, and uploading code.

7. Programming Workflow: Write, compile, and upload via USB. Bootloader handles it.

8. Libraries: Rich ecosystem of pre-built libraries simplifies development.

9. Hardware Control: Fully programmable I/O, ADC, PWM, and communication interfaces.

10. Community Support: Active user community for project sharing and development.

Pinout

• 5V Pin: Regulated power output for peripherals.

• GND Pins: Common ground reference.

• Digital I/O (0–12): Configurable as inputs or outputs.

• PWM Outputs: 6 pins support PWM signal generation.

• AREF Pin: Sets reference voltage (0–5V) for analog inputs.

• I2C:

  • SDA (Serial Data)

  • SCL (Serial Clock)

• UART:

  • Pins 6 and 7 (RX/TX)

• USB: Micro USB for power and programming (software USB enabled).

• Onboard LED: Connected to Pin 1.

• Analog Inputs (A0–A7): 8 ADC input pins.

• VIN: External power input (7–12V DC).

• Power LED: Indicates board is powered.

Applications

• Industrial Machinery Control

• Solar System Management

• IoT Projects

• Battery Charging & Power Supply Systems

• Weather Monitoring

• Wireless Communication Projects

• Security Systems

• Medical Devices

• Automotive Applications

Circuit

• No external circuit required for testing.

• Built-in LED on Pin 1 is used for basic code example.

Getting Started (First-Time Setup)

1. Download Arduino IDE: Arduino IDE Download

2. Connect the Board:

   • Go to File → Preferences

   • Add this URL: http://digistump.com/package_digistump_index.json

3. Install Board Package:

   • Go to Tools → Board → Boards Manager…

   • Search for “Digispark” → Install “Digistump AVR Boards”

4. Install Drivers (Windows Only):

   • Download and extract Digistump.Drivers.zip

   • Run DPinst64.exe (or DPinst.exe for 32-bit systems)

   • Accept installation prompts

5. Select Board:

   • Tools → Board → Digispark Pro (16MHz)

   • No need to configure Port or Programmer

6. Upload Sketch:

   • Click Upload

   • Plug in the board when prompted

7. Execution Delay:

   • On power-up, there's a 5-second delay for programming check

Sample Code

// Define constants
const int onboardLED = 1;
const int blinkInterval = 200;

void setup() {
  pinMode(onboardLED, OUTPUT);
}

void loop() {
  digitalWrite(onboardLED, HIGH); // LED ON
  delay(blinkInterval);
  digitalWrite(onboardLED, LOW);  // LED OFF
  delay(blinkInterval);
}

Explanation:

• setup(): Initializes pin 1 as output.

• loop(): Toggles LED on and off every 200ms.