Velleman VMP502, User Manual, Page: 28 / 51

VMP502
V. 02
–
25/10/2019 28 ©Velleman nv
6.9 Driving LEDs by 74HC595
We will use the 74HC595 to make eight LEDs blink regularly.
Required Hardware
•
1 x Raspberry Pi
®
•
1 x breadboard
•
1 x 74HC595
•
8 x LED
•
3 x 220
Ω
resistor
•
jumper wires as needed
The 74HC595 is a silicon CMOS device, which has an 8-bit shift register and a memory with three-state output
function. Compatible with low voltage TTL circuit, the 74HC595 can transform the serial input of 8-bit data into
parallel output of 8-bit data. It is often used to extend the GPIO for embedded system and drive low power
devices.