Description
74HC595 8-bit shift registers – easily expand output capabilities of Arduinos.
Includes 10pcs.
The picture is just a generic 16-pin DIP IC, a real picture is coming soon.
Below is some relevant info, and how to use them with Arduino.
How shift registers work, and using ONE: https://learn.adafruit.com/adafruit-arduino-lesson-4-eight-leds/the-74hc595-shift-register
Using TWO or more: http://www.instructables.com/id/Arduino-16-LEDs-using-two-74HC595-shift-registers-/