User Manual

Table Of Contents

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.