LED Combination control using Arduino - Arduino

RE: LED Combination control using Arduino

Hans — Tue, 12 Apr 2022 08:48:14 +0000

I'm not sure what you have in mind, but shorting V and GND is never a good idea. So I would not take that as a viable option to implement.

RE: LED Combination control using Arduino

Anonymous — Tue, 12 Apr 2022 03:00:26 +0000

@hans

Thank you for your detailed reply.

I am trying to procure WS2812 and will try to control select LEDs using an Arduino UNO.

I was just curious about one thing, if I am able to control the switching ON of the required LEDs, more than half of my task is done. Now to reset a particular LED that is glowing, can I just add a tactile switch between the +ve and the GND pins and press it to short the supply to ground which will switch the LED off for that moment and when I release the tact switch, the LED won't glow again in absence of a trigger that initially switched it ON.

In that case, I will not have a feedback to the system to know that the LED is now OFF, which is pretty much okay with me.

So basically if I have a switching ON mechanism in place, I just need to find a way to reset the LED and make it OFF.

RE: LED Combination control using Arduino

Hans — Thu, 07 Apr 2022 12:17:12 +0000

First of all, thanks for making me familiar with the event library - I didn't know this one existed. 😊

As for applying this to 60 LEDs ... do you want 60 switches with that as well?

60 LEDs: I'd start using addressable RGB LEDs instead of individual LEDs - like the WS2811 or WS2812.
These are available as strips, or "individual" LEDs ... you will be able to get those from Amazon and the look like this:

292

(strips)

294

(individuals)

This way you'd need only one pin for all 60 LEDs (see my article on WS2811/WS2812).

If you want 60 buttons as well, then you'll need to look into some kind of multiplexer, so you can connect that many switches.
Unfortunately, a matrix won't work - as it would still need too many pins (6x10 = 6+10 = 16 pins needed).
My experience with multiplexers and shift-registers is pretty much zero.

You could also try using a regular keyboard (has more than 100 keys, and you could take it apart so you can wire switches to replace the keyboard switches).
I found a project that actually allows you to connect a USB keyboard to your Arduino.

Hope this helps ...

RE: LED Combination control using Arduino

Anonymous — Thu, 07 Apr 2022 10:40:42 +0000

@hans

What I need to do now is make the logic work for 60 LEDs.

I know it will not be done the same way the code has been written, but can you guide me with something that will work?

RE: LED Combination control using Arduino

Anonymous — Thu, 07 Apr 2022 10:39:16 +0000

#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);
}

RE: LED Combination control using Arduino

Anonymous — Thu, 07 Apr 2022 10:36:36 +0000

@hans - I tried doing it again but still unable to. Let me see if I can attach a file.

RE: LED Combination control using Arduino

Hans — Thu, 07 Apr 2022 10:00:50 +0000

Hi Nikhil_m,

Sorry for the inconvenience ....
The forum will not allow posting code or attachments until at least 5 posts have been manually approved - too many people spam forums like this and we'd like to prevent that

I think you just managed to get 5 posts 😊
Feel free to try to post the code again. (ideally also attached as an ino file).

RE: LED Combination control using Arduino

Anonymous — Thu, 07 Apr 2022 04:18:13 +0000

@hans Thank you for supporting me.

I was able to run the program with desired output.

I took some help from a friend, and we also referred to the reply from you on this thread.

I am trying to share the code here but not able to see the reply once I post it.

RE: LED Combination control using Arduino

Anonymous — Thu, 07 Apr 2022 04:11:17 +0000

@hans I am trying to post the code but unable to do so

RE: LED Combination control using Arduino

Hans — Wed, 30 Mar 2022 09:57:59 +0000

Would you mind posting your code? This way I may be able to see what is going wrong ... 😊