74HC595

The 74HC595 is an 8-bit serial shift register with storage register and tri-state parallel output.

Quick pinout (DIL-16):

1. Q_B
2. Q_C
3. Q_D
4. Q_E
5. Q_F
6. Q_G
7. Q_H
8. GND
9. Q_H': serial out
10. SRCLR: storage register clear
11. SRCLK: storage register clock
12. RCLK: register clock (latch)
13. OE: output enable
14. SER: serial in
15. Q_A
16. VCC

both clocks are positive edge triggered

Location: Somewhere (probably somewhere in the racks on top of the soldering table)