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UNITED KINGDOM • + Follow

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UNITED KINGDOM
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Components

	LED 5mm Red	x 14
	resistor 220 ohms triark	x 8
	resistor 10k ohms triark	x 3
	tactile push button 6mm aliexpress	x 1

Description

a heart led board

so this PCB does not come with a place for it but you will need a microcontroller and at the bottom each one of the holes have a diameter of 5mm in case you need a place to crew a box with a microcontroller and/or a battery. so basically each led is connected in rows to one of the digital pins labelled and they are all connected at the pin headers at the bottom. the code is posted on here too so this code makes it so the button on D10 constantly keeps the LED's on without a pattern, the middle button (D11) is a pattern where the LED's chase each other to the top, and finally the 3rd button is a heartbeat. this is optional however and you can create your own code but just in case I posted it too. This can be used as a night light or just a present to give to someone its really up to you.

Code

led heart patterns

Arduino

const int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9};
const int btnPins[] = {10, 11, 12};
int mode = 1;

// Memory for button states
bool lastBtnState[] = {HIGH, HIGH, HIGH}; 

unsigned long lastTime = 0;
int step = 0;

void setup() {
  for (int i = 0; i < 8; i++) pinMode(ledPins[i], OUTPUT);
  for (int i = 0; i < 3; i++) pinMode(btnPins[i], INPUT_PULLUP);
}

void loop() {

  for (int i = 0; i < 3; i++) {
    bool currentState = digitalRead(btnPins[i]);

  
    if (currentState == LOW && lastBtnState[i] == HIGH) {
      mode = i + 1;  
      step = 0;      
      clearAll();
      delay(50);     
    }
    lastBtnState[i] = currentState; // Remember for next time
  }

  
  unsigned long now = millis();
  if (mode == 1) {
    for (int i = 0; i < 8; i++) digitalWrite(ledPins[i], HIGH);
  } 
  else if (mode == 2) {
    if (now - lastTime >= 100) {
      lastTime = now;
      clearAll();
      digitalWrite(ledPins[step % 8], HIGH);
      step++;
    }
  } 
  else if (mode == 3) {
    if (now - lastTime >= 200) {
      lastTime = now;
      step = !step;
      for (int i = 0; i < 8; i++) digitalWrite(ledPins[i], step);
    }
  }
}

void clearAll() {
  for (int i = 0; i < 8; i++) digitalWrite(ledPins[i], LOW);
}

Schematic and Layout

bottom pinout

Picture10.png

Download Gerbers

Apr 06,2026

31 views

a heart led board

2 Layers PCB 121.9 x 126.8 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen

Published: Apr 06,2026

Standard PCB

Download Gerber file 0

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