Published December 31, 2021 © CC BY

Addressable through hole LEDs

Thank you JLCPCB for sponsoring this project. Please order your PCB at jlcpcb.com/RAT

IntermediateWork in progress3 hours480

Things used in this project

Hardware components

JLCPCB Customized PCB

Arduino Nano R3

PL9823 RGB Through hole LED 8mm

Single Turn Potentiometer- 10k ohms

Female Header 15 Position 1 Row (2.54mm)

DIP Switch 2 Pin Through Hole

Through Hole Resistor, 51 ohm

Capacitor 100 nF

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)

Solder Wire, Lead Free

Story

Thank you JLCPCB for sponsoring this project.

The Addressable through hole LEDs can change the colors of the PL9823 addressable RGB LEDs by varying the HSV and the RGB parameters.

HSV stands for Hue, Saturation, Value.

Hue is the color of the light from red to magenta.

Saturation is the grayness of the color, lower means more gray, higher means more towards that color.

Value is the brightness of the color, lower means darker, higher means brighter.

There are 16 LEDs on each side of the PCB. Each side is controlled by either only HSV or RGB parameter.

Please test the RGB LEDs before soldering. We require 2 RGB LEDs for each test. Connect a capacitor across each RGB LED VDD and GND, and a resistor in series with the VDD. Please refer to the schematic diagram. VDD and GND are to be wired to a 5V power supply. Din connects to the Arduino, Dout connects to the other RGB LED Din.

We are using the FastLED Arduino library for the Arduino Nano board. The HSV and the RGB vary from 0 to 255 for each parameter. The 3362P potentiometers are used to tune the parameters.

It is highly recommended to use an external power supply such as USB C board and add in a capacitor parallel to the power supply to the 2 power supply copper pads.

Thank you JLCPCB again for sponsoring this project and please order your PCB at jlcpcb.com/RAT

Code

Addressable through hole LEDs code

#include <FastLED.h>

#define NUM_STRIPS 2
#define NUM_LEDS_PER_STRIP 16
CRGB leds[NUM_STRIPS][NUM_LEDS_PER_STRIP];

#define Pot_H A0
#define Pot_S A1
#define Pot_V A2
#define Pot_R A3
#define Pot_G A4
#define Pot_B A5

int i, j;

void setup()
{
  pinMode (Pot_H, INPUT);
  pinMode (Pot_S, INPUT);
  pinMode (Pot_V, INPUT);
  pinMode (Pot_R, INPUT);
  pinMode (Pot_G, INPUT);
  pinMode (Pot_B, INPUT);
  FastLED.addLeds<PL9823, 2, RGB>(leds[0], NUM_LEDS_PER_STRIP);   //GRB
  FastLED.addLeds<PL9823, 3, RGB>(leds[1], NUM_LEDS_PER_STRIP);   //GRB
}

void loop()
{
  int Pot_H_val = map(analogRead(Pot_H), 0, 1023, 0, 255);
  int Pot_S_val = map(analogRead(Pot_S), 0, 1023, 0, 255);
  int Pot_V_val = map(analogRead(Pot_V), 0, 1023, 0, 255);
  
  int Pot_R_val = map(analogRead(Pot_R), 0, 1023, 0, 255);
  int Pot_G_val = map(analogRead(Pot_G), 0, 1023, 0, 255);
  int Pot_B_val = map(analogRead(Pot_B), 0, 1023, 0, 255);

  for (i=0; i<16; i++)
  {
    leds[0][i] = CHSV(Pot_H_val, Pot_S_val, Pot_V_val);
    FastLED.show();
  }
  for (j=0; j<16; j++)
  {
    leds[1][j] = CRGB(Pot_G_val, Pot_R_val, Pot_B_val);
    FastLED.show();
  }
  delay (10);
}

Credits

limchengwei

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