If you want to learn the basics of electronics and Linux programming, this kit is a wonderful choice for you. In the process of learning this kit, you will get perfect technical support. By learning this kit, you will be fully aware of the wonderful world of electronics and the fun of DIY. This is an Ultrasonic Distance Sensor Starter Learning kit for UNO R3. The kit contains more than 150 components and electronic modules. We have prepared a Tutorial (90 pages PDF) and supporting experimental code routine for you to learn. The guide book includes 20 Projects, and the code is provided in "C" language. Package List: 1x UNO R3 Board, 1x Ultrasonic Distance Sensor, 1x Ultrasonic Distance Sensor Holder, 1x Servo, 1x DC Motor, 1x L293D Motor Driver IC, 1x Relay, 1x LCD1602, 1x 7-Segment Display, 1x Active Buzzer, 2x Analog Temperature Sensor(Thermistor), 2x Light Sensor(Photoresistor), 1x Tilt Switch, 2x Switch, 1x RGB LED, 10x Red LED, 4x Green LED, 4x Yellow LED, 4x Blue LED, 16x Resistor(220O), 10x Resistor(1kO), 5x Resistor(10kO), 5x Capacitor(104), 2x Capacitor(10uF), 4x Button(large), 5x Button(small), 1x Button Cap(red), 1x Button Cap(white), 2x Button Cap(blue), 2x NPN Transistor(8050), 2x PNP Transistor(8550), 1x Potentiometer(10KOhm), 2x 1N4148 Diode, 2x 1N4001 Diode, 1x Breadboard, 1x USB Cable, 1x Battery Holder, 40x M-M Jumper Wires, 20x M-F Jumper Wires, 1x Header(40pin), 1x Band Resistor Card.