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SparkFun Redboard vs. Arduino Uno: Which is Better? - ElectronicsHacks
Amazon.com: SparkFun RedBoard - Compatible with Arduino Breadboard-able Development board w/ R3 footprint Microcontroller serves as physical computing learning platform Connect to computer with USB Mini-B : Electronics
Amazon.com: SparkFun RedBoard Qwiic ATMega328P compatible with Arduino board w/ Qwiic Connector and CH340C Serial-USB Converter IC Breadboardable R3 footprint microcontroller Improved reset button : Electronics
RedBoard Hookup Guide Datasheet by SparkFun Electronics | Digi-Key Electronics