LED Combination control using Arduino

[Nikhil_M]

Hello!



I am a beginner at Arduino. I need to implement a simple circuit to control various LED glow scenarios and their reset using tact switches.

I request to please help me with this project.

I am attaching the image of the assembly done on bread board.





The circuit is intended to function as below:

System must take the input from the user.



User selects Scenario 1.

LEDs L1, L2 and L4 should turn ON.

User presses S1 which will turn off L1, similarly S2 will turn off L2 and S4 will turn off L4.

All LEDs are now turned OFF.



System waits for next input from user.



User selects Scenario 2.

LEDs L1, L3 and L5 should turn ON.

User presses S1 which will turn off L1, similarly S3 will turn off L3 and S5 will turn off L5.

All LEDs are now turned OFF.



System waits for next input from user.



User selects Scenario 3.

LEDs L2, L3 and L5 should turn ON.

User presses S2 which will turn off L2, similarly S3 will turn off L3 and S5 will turn off L5.

All LEDs are now turned OFF.



System waits for next input from user.



User selects Scenario 4.

LEDs L1, L3 and L4 should turn ON.

User presses S1 which will turn off L1, similarly S3 will turn off L3 and S4 will turn off L4.

All LEDs are now turned OFF.



Please help me with the logic and the code to make this work.



Thank you in advance!

 

[Wp100]

The Arduino IDE has code Examples of what you need to do - start with those simple programs and build from there.

Your LED will need resistors unless they are the type that run from 5V, same with the switches, you will need a Pull up or Pull down resistor for each switch, plenty of good online tutorials around including the Arduino site.

https://learn.adafruit.com/adafruit-arduino-lesson-2-leds/breadboard-layout

https://learn.adafruit.com/adafruit-io-basics-digital-input/arduino-wiring

 

[danadak]

You basically have to build a state machine in code. So tackle one switch and its
affects on LEDs to start.

Google "arduino state machine", lots of resources.

https://www.state-machine.com/doc/AN_Event-Driven_Arduino-1.6.x.pdf

What constitutes the end of a state has occurred, the turn off of all leds ?


Regards, Dana.

 

[Pommie]

When you say "selects scenario 1" do you mean button 1 is pressed?

Mike.

 

[Nikhil_M]

Hello All,

Thank you everyone who responded to my post.

With some help I was able to achieve the desired results of the LED combinations using an Arduino Uno.

The code that worked is as below:

#include <EventButton.h>
EventButton firstButton(9);
EventButton secondButton(2);
EventButton thirdButton(3);
EventButton fourthButton(10);
EventButton fifthButton(11);
int a1 = 12;
int a2 = 8;
int a3 = 4;
int a4 = 5;
int a5 = 6;


void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
pinMode(a1, OUTPUT);
pinMode(a2, OUTPUT);
pinMode(a3, OUTPUT);
pinMode(a4, OUTPUT);
pinMode(a5, OUTPUT);

firstButton.setClickHandler(onFirstButtonClicked);
secondButton.setClickHandler(onSecondButtonClicked);
thirdButton.setClickHandler(onThirdButtonClicked);
fourthButton.setClickHandler(onFourthButtonClicked);
fifthButton.setClickHandler(onFifthButtonClicked);
}

void loop()
{

char data = Serial.read();
switch (data) //Selection Control Statement
{
case '1':
digitalWrite(a1, HIGH);
digitalWrite(a2, HIGH);
digitalWrite(a4, HIGH);
break;
case '2':
digitalWrite(a1, HIGH);
digitalWrite(a3, HIGH);
digitalWrite(a5, HIGH);
break;
case '3':
digitalWrite(a1, HIGH);
digitalWrite(a2, HIGH);
digitalWrite(a3, HIGH);
break;
case '4':
digitalWrite(a1, HIGH);
digitalWrite(a3, HIGH);
digitalWrite(a4, HIGH);
break;

}

firstButton.update();
secondButton.update();
thirdButton.update();
fourthButton.update();
fifthButton.update();
}

void onFirstButtonClicked(EventButton& eb) {
Serial.print("First button clicked ");
digitalWrite(a1,LOW);
}

void onSecondButtonClicked(EventButton& eb) {
Serial.print("Second button clicked: ");
digitalWrite(a2,LOW);
}

void onThirdButtonClicked(EventButton& eb) {
Serial.print("Third button clicked: ");
digitalWrite(a3,LOW);
}

void onFourthButtonClicked(EventButton& eb) {
Serial.print("Fourth button clicked ");
digitalWrite(a4,LOW);
}

void onFifthButtonClicked(EventButton& eb) {
Serial.print("Fifth button clicked ");
digitalWrite(a5,LOW);
}
[\code]

 

[Nikhil_M]

Now I need to scale the same combination to control around 60 LEDs.
I need guidance from this forum on how can that be done.
Thanking you in advance!

 

[Pommie]

Well, an Uno doesn't have 60 pins to control 60 LEDs so I suggest a multiplexed 8 by 8 LED matrix and an array of 8 bytes to hold the current value. Or consider using a MAX7219 - many examples available. I'd (personally) try to get rid of the event handler and read the keys directly - don't think you even need debounce.

Mike.
Edit, do you also need 60 pushbuttons?

 

[danadak]

WS2812 ? To cascade a lot of LEDs ?

What is WS2812b LED and how to use WS2812b LED

WS2812 LED also called WS2812b LED, wiring diagram, programming with Adafruit, Arduino and Raspberry PI, products and applications.

www.sdiplight.com

WS2812b LED Strip Addressable Flexible China Manufacturer Supplier

WS2812b LED strip China manufacturer provide project services as lighting effects design. Or customize addressable LED strip for your electronic products.

www.sdiplight.com

Regards, Dana.

 

[Nikhil_M]

Well, an Uno doesn't have 60 pins to control 60 LEDs so I suggest a multiplexed 8 by 8 LED matrix and an array of 8 bytes to hold the current value. Or consider using a MAX7219 - many examples available. I'd (personally) try to get rid of the event handler and read the keys directly - don't think you even need debounce.

Mike.
Edit, do you also need 60 pushbuttons?

Hello Mike,

I need 60 push buttons that will feedback to the controller about a manual event and the respective LED should turn off.

Also, I will search more about MAX7219.

 

[Nikhil_M]

WS2812 ? To cascade a lot of LEDs ?

What is WS2812b LED and how to use WS2812b LED

WS2812 LED also called WS2812b LED, wiring diagram, programming with Adafruit, Arduino and Raspberry PI, products and applications.

www.sdiplight.com

WS2812b LED Strip Addressable Flexible China Manufacturer Supplier

WS2812b LED strip China manufacturer provide project services as lighting effects design. Or customize addressable LED strip for your electronic products.

www.sdiplight.com

Regards, Dana.

Hello Dana,

Thank you for the reply. I will check more about WS2812.

 

[danadak]

Google this, lots of hits -

"arduino ws2812"



Regards, Dana.

 

[danadak]

Alternative is a 64 bit SIPO shift register -

64 Bit Serial In Parallel Out Shift Register

Hi, I have seen users occasionally needing large I/O expanders, cascading some off the shelf parts to get enough I/O. This was done in Verilog, features set/clr/load. Note design shown Serout and Serin were tied together to do some testing...

www.electro-tech-online.com

This solution has to take into account current thru leds and total current thru each 8 bit port.

That limit is 100 mA per port.



Regards, Dana.

 

[Nigel Goodwin]

Google this, lots of hits -

"arduino ws2812"



Regards, Dana.

I came across a large WS2812 flexible panel for sale the other day, current consumption was listed as 75A with all LEDs lit

Needless to say, it had multiple power feeds, rather than just feeding through the WS2812's.

 

[danadak]

Nikhil_M​

This does not look like you are doing high current LEDs, more like 10 - 20 mA
types of LEDs. Can you confirm how much LD current you need ?

Regards, Dana.

 

[tepalia02]

Are these LEDs white, blue or multicolor?