Introduction: How to Control 8 LEDs Module With MUX Breakout

Picture of How to Control 8 LEDs Module With MUX Breakout

MUX / Demux breakout module is a module that can be used to add, either from the input or output of the micro-controller pin. This module really helps us if we experience deficiencies in the output pin or input pin. In this case example, the MUX / Demux breakout will be used to control the dimming level of the flame of 8 LEDs by using 1 output pin of PWM.

Step 1: Materials You Need

Picture of Materials You Need

Step 2: Setup

Picture of Setup

Connect SFE Minsys Atmega8/168/328, SFE Mux Breakout, and SFE 8 LEDs Module with jumper wires as schematic above.

Step 3: Code

Picture of Code

First, open Arduino IDE. The next step is to declare the pin that will be used i.e 3 pins for the selector and 1 pin for the PWM output.

#define selectorA 13
#define selectorB 12
#define selectorC 11
#define outPWM 10

Then, initialization of the pin used.

void setup() {

// initialize digital pin 13 as an output.
pinMode(selectorA, OUTPUT);
pinMode(selectorB, OUTPUT);
pinMode(selectorC, OUTPUT);
pinMode(outPWM, OUTPUT);

}

Then, create a function to make a selector which will be active.

void activSel(int a, int b, int c)
{

digitalWrite(selectorA, a);
digitalWrite(selectorB, b);
digitalWrite(selectorC, c);

}

In the Loop function, call the activSel function and then give the PWM output as follows.

void loop() {

activSel(0,0,0);
analogWrite(outPWM, ~255);
delay(1000);
activSel(0,0,0);
analogWrite(outPWM, ~100);
delay(1000);

}

In the activSel function call, 3 values are given, namely selector A = 0, selector B = 0, and selector C = 0 which means the output of the MUX / Demux breakout at output 1. While the output of the PWM is inversed because the LED module is active LOW. Here is the truth table of the 3 pieces of selector.

#define selectorA 13
#define selectorB 12
#define selectorC 11
#define outPWM 10

// the setup function runs once when you press reset or power the board
void setup() {

// initialize digital pin 13 as an output.
pinMode(selectorA, OUTPUT);
pinMode(selectorB, OUTPUT);
pinMode(selectorC, OUTPUT);
pinMode(outPWM, OUTPUT);

}

// the loop function runs over and over again forever

void loop() {

activSel(0,0,0);
analogWrite(outPWM, ~255);
delay(1000);
activSel(0,0,0);
analogWrite(outPWM, ~100);
delay(1000);

}

void activSel(int a, int b, int c)

{

digitalWrite(selectorA, a);
digitalWrite(selectorB, b);
digitalWrite(selectorC, c);

}

Comments

About This Instructable

92views

0favorites

License:

Bio: Electronics Component - PCB [Design, Printing, Inserting] - Electronic Programming
More by sfeelectronics:Display Text at P10 LED Display Using Arduino Score Board Project With P10 LED Display Using DMDManual Access of GPS Ublox Neo 6M With Raspberry Pi B+
Add instructable to: