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ATtiny85 Female MicroUSB, Dev. Board (Digispark Compatible) RobotDYN

ATtiny85 Female MicroUSB, Dev. Board (Digispark Compatible) RobotDYN

The RobotDYN Digispark Black is a compact ATtiny85-based development board. While less powerful than an Arduino, it’s significantly cheaper and smaller (18×21×2 mm). It connects via micro-USB through a bootloader, which uses 2 KB of flash, leaving 6 KB for programming. Despite lacking native USB support, it uses the V-USB library to emulate USB 1.1, allowing it to function as a keyboard, mouse, joystick, or COM port. It can be programmed using the Arduino IDE.

Package Includes

  • 1× Digispark ATtiny85 development board (micro-USB)
  • 1× PLS-6 contact pins
  • 1× PLS-3 contact pins

14.50 AED 14.50 AED Tax Included
14.50 AED Tax Included

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Features

  • Microcontroller: AVR ATtiny85 (8-bit)

  • Color: Black

  • Model: Digispark ATtiny85 (micro-USB)

  • Clock Frequency: Up to 20 MHz

  • Interface: Micro-USB

  • Flash Memory: 8 KB (6 KB usable)

  • SRAM: 512 B

  • EEPROM: 512 B

  • I/O Pins: 6

  • PWM Pins: 2

  • ADC Pins: 4

  • Hardware Interfaces:

    • 1× SPI

    • 1× I2C

  • Onboard Power LED and Status LED

  • Voltage Regulator: 5V

Principle of Work

This board is built on open hardware and free software principles.

  • Compatible with Arduino IDE.

  • Supports embedded USB functionality using V-USB.

  • Can be extended using open-source libraries and examples.

Pinout

Pinout

Function Pins
GPIO P0, P1, P2, P3, P4, P5 (6 GPIO)
SPI MOSI (P0), MISO (P1), SCK (P2)
PWM P0, P1, P3, P4 (4 PWM)
ADC A1, A3, A4, A5 (4 ADC)
I2C SDA (P0), SCL (P2)

I/O and Interfaces

  • Digital I/O: 6 pins (4 PWM-capable)

  • Analog Pins: 4 analog inputs

  • GND: Ground pin

  • AREF: Analog reference voltage (0–5V)

  • SDA/SCL: I2C communication pins

  • USB: Software USB via V-USB

  • Onboard LED: Controlled via pin 1

  • Voltage Regulator: Converts 7–12V to 5V

  • Power Pins:

    • 5V: Output

    • VIN: 7–12V input

  • Power LED: Confirms power supply status

Applications

  • Industrial control systems

  • Solar systems

  • IoT devices

  • Power supply & charging circuits

  • Weather stations

  • Wireless modules

  • Security systems

  • Medical equipment

  • Automotive systems

Testing Circuit

No additional circuit needed — uses built-in LED on pin 1.

Getting Started

1. Install Arduino IDE

Download Arduino IDE

2. Connect the Board to Your PC

3. Add Board Manager URL

  • Go to File → Preferences

  • Add this URL in Additional Board Manager URLs:

    http://digistump.com/package_digistump_index.json

  • Click OK

4. Install Board Package

  • Go to Tools → Board → Boards Manager...

  • Search for Digistump AVR Boards and click Install

5. Install Drivers (Windows 10)

  • Download: Digistump.Drivers.zip

  • Extract and run:

    • DPinst64.exe (64-bit)

    • DPinst.exe (32-bit)

  • Approve unsigned driver installation if prompted

6. Select Board

  • Go to Tools → Board → RobotDYN Digispark (Default – 16.5 MHz)

  • No need to set Programmer or Port

7. Upload Sketch

  • Disconnect the board first

  • Write or load a sketch

  • Click Upload, then connect the board when prompted

  • Code runs after a 5-second boot delay

Example Code

void setup() {
  pinMode(1, OUTPUT); // Onboard LED connected to pin 1
}

void loop() {
  digitalWrite(1, HIGH);
  delay(200);
  digitalWrite(1, LOW);
  delay(200);
}

Technical Details

  • Microcontroller: ATtiny85

  • Clock Speed: 16.5 MHz

  • Operating Voltage: 5V

  • Max Output Current: 800 mA

  • Input Voltage (recommended): 7–12V

  • Output Voltage: 5V

  • Digital I/O Pins: 6

  • Rated Current per Pin: 20 mA

  • Low Power:

    • 300 μA @ 1.8V active

    • 0.1 μA @ 1.8V sleep

  • Temperature Range: -40°C to +105°C

  • USB Input: 5V

  • VIN Input: 6–12V

  • Logic Level Voltage: 5V

  • Dimensions: 18×21×2 mm

  • Weight: 3 g

Resources

  • Arduino IDE Download

  • Digistump Drivers for Windows

  • C++ Reference Guide

  • Arduino IDE Reference

  • ATtiny85 Datasheet

Comparison

Compared to the Arduino Uno:

  • Weaker performance, but

  • USB emulation support (via V-USB)

  • Smaller and cheaper

  • Built-in LDO regulator

  • Ideal for compact, simple projects

  • Not recommended for complete beginners