ADEEPT Ultimate Sensor Kit for Raspberry Pi - Lesson 25 LED Bar Graph

Lesson 25 LED Bar Graph
Introduction
The LED bar is an analog indicating component usually used for volume indication.
Components
- 1 * Raspberry Pi
- 1 * GPIO Extension Board
- 1 * 40-Pin GPIO Cable
- 1 * Breadboard
- 1 * LED Bar Module
- 1 * 4-Pin Wires
Experimental Principle
The Fritzing image:
The Physical picture:
Pin definition:
DI
Data In
DCLK
Clock
+
VCC
-
GND
The experiment is to control the number of LEDs brightened on the LED bar graph by
programming the Raspberry Pi.
Experimental Procedures
Step 1: Build the circuit