SainSmart Mega ADK R3 Starter Kit for Arduino (2-CH Relay + LCD1602 + HC-SR04 Distance Sensor included) With PDF Tutorial Instruction Manual on Basic Arduino Projects for Beginners You could do hundreds of Arduino projects with this SainSmart ADK R3 Kit. Components are included in the kit to get you started making your own Arduino Projects. A PDF Tutorial Instruction Manual will be provided to give you a full into to Arduino programming. With this kit you will learn what Arduino is all about and how it is used.