Freenove Ultimate Starter Kit

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Chapter 27 Solder Circuit Board

280

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Connect the Circuit

Connect the board to Raspberry Pi with jumper wire in the following way.

—

GPIO.17

ST_CP

—

GPIO27

SH_CP

—

GPIO22

GND

—

GND

VCC

—

3.3V/5V

Code

This is the third time we have made flowing water light. In this project, we solder a completely new circuit for

flowing water light. Additionally, the program is also different from previous ones. When this light flows, it will

bring a long tail.

C Code 27.2.1 LightWater03

First observe the project result, and then analyze the code.

1. Use cd command to enter 27.2.1_LightWater03 directory of C code.

cd ~/Freenove_Ultimate_Starter_Kit_for_Raspberry_Pi/Code/C_Code/27.2.1_LightWater03

2. Use following command to compile “LightWater03.c” and generate executable file “LightWater03”.

gcc LightWater03.c -o LightWater03 -lwiringPi

3. Then run the generated file “LightWater03”.

sudo ./LightWater03

After the program is executed, the LEDs will light up in the form of flowing water and carry a long tail.