Bundle ValueA stronger bare-board starter bundle for buyers who want a controller plus a richer bench of basic components; Buy Together AdvantageUse the UNO board as the brain and the upgraded kit as the parts supply for many small but useful experiments; UNO R3 Controller BoardUse it as an ATmega328P UNO R3 compatible controller board using CH340C interface and clearly printed pin names; Upgraded Electronics Fun KitAdd it to stock the bench with common parts for breadboard circuits, testing and troubleshooting; Project IdeasBuild LED arrays, input switches, buzzer alerts, transistor switching, power-module practice and circuit debugging; check wiring, voltage, libraries and drivers before custom experiments