SparkFun Inventor's Kit Bridge Pack v4.1 (KIT-15476) upgrades the SparkFun Inventor's Kit (SIK) v4.0 (KIT-14536) to the equivalent of the SIK v4.1 (KIT-15267), without buying a whole new kit. The Bridge Pack includes all of the new parts found in the SIK v4.1 that aren't in V4.0, as well as the updated SIK v4.1 guidebook.
Kit Contents
SparkFun RedBoard QwiicSparkFun Inventor's Kit Guidebook