Name: Freenove Ultimate Starter Kit
Brand: Freenove
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Chapter 17 74HC595 & LEDBar Graph

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Chapter 17 74HC595 & LEDBar Graph

We have used LEDBar Graph to make a flowing water light, in which 10 GPIO ports of RPi is occupied. More

GPIO ports mean that more peripherals can be connected to RPi, so GPIO resource is very precious. Can we

make flowing water light with less GPIO? In this chapter, we will learn a component, 74HC595, which can

achieve the target.

Project 17.1 Flowing Water Light

Now let‘s learn how to use 74HC595 to make a flowing water light with less GPIO.

Component List

Raspberry Pi 3B x1

GPIO Extension Board & Wire x1

BreadBoard x1

Jumper

74HC595 x1

LEDBar Graph x1

Resistor 220Ω x8

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