The SparkFun BlackBoard is an Arduino Uno-compatible development board with a range of improvements over the standard Uno. It features the CH340G USB-to-serial converter for broad driver compatibility, a reinforced through-hole micro-B USB connector, an upgraded 600 mA 3.3V regulator with thermal and reverse circuit protection, and a Qwiic I2C connector for quick connection to I2C peripherals.

Additional refinements include extra decoupling capacitance for improved ADC sensitivity, dimmed indicator LEDs, 3.3V voltage translation on the Qwiic connector, and an I/O voltage jumper that lets advanced users switch the board to 3.3V operation. It comes pre-loaded with the Optiboot bootloader and programs as "Arduino/Genuino Uno" in the Arduino IDE.

Key Features

• Microcontroller – ATmega328P with Optiboot bootloader
• Digital I/O – 14 pins (6 with PWM)
• Analog Inputs – 4 usable (A0–A3; A4/A5 have I2C pull-ups)
• Communication – UART, SPI, I2C (with Qwiic connector)
• USB-to-Serial – CH340G with reinforced micro-B connector
• 3.3V Regulator – 600 mA with thermal and reverse protection
• Qwiic Connector – 3.3V-translated I2C for plug-and-play sensors
• I/O Voltage Jumper – Switchable between 5V (default) and 3.3V operation
• Power Input – USB or barrel jack (7–15V DC)
• SMD ISP Header – For SPI shield connections

Ideal For

• Arduino projects requiring improved power regulation
• Quick prototyping with Qwiic I2C sensors and peripherals
• 3.3V-sensitive shield and peripheral applications
• Learning and education with Arduino

Package Contents

• 1× SparkFun BlackBoard