How to use a 74hc595 shift register – Marginally Clever Robots
Shift Registers - 74HC595 & 74HC165 with Arduino
Serial to Parallel Shifting-Out with a 74HC595 | Arduino
74HC595 Datasheet PDF , Integral : 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs, high-performance silicon-gate CMOS