Adafruit (PID 170) ARDX - v1.3 Experimentation Kit for Arduino (Uno R3) - v1.3 Experimentation kit with American-made Arduino UNO R3 13 circuits to explore microcontroller basics. Covering LEDs, transistors, motors, integrated circuits, pushbuttons, variable resistors, photo resistors, temperature sensors & relays. Printed copy of the Arduino Experimenter's Guide means no need to flip between on-screen windows. Each circuit includes a layout sheet, eliminating guesswork when it comes to component placement.