Marius M

ROMANIA • + Follow

Engineer

AUSTRALIA
- 0
- 0
Alexis Gimeno

SPAIN
- 5
- 2
Максим Maxbolt

BELARUS
- 8
- 0
Néstor

SPAIN
- 0
- 0
4

WhatsApp Image 2023-12-02 at 16.45.31_17408963.jpg

Description

PCB Christmas Tree 2023

A small PCB Christmas tree, using ATtiny85 / ATtiny13A and TTP223 touch sensor.

There are 11 LEDs controlled by four ATtiny pins, plus a TTP223 touch sensor linked to another ATtiny pin, which act as a switch that toggle between different lightning patterns (including an OFF "pattern").

I designed the PCB in order to be able to use both SMD and classic 3mm LEDs.

Please be aware when you order the PCBs.

The zip file I uploaded here (Gerber_PCB_v1.05-STAR_A+B.zip) contains the two .zip files ( A and B parts) of the actual Gerber files. You have to extract the initial Gerber_PCB_v1.05-STAR_A+B.zip file and then upload the Gerber files.

I did this so you can order the A and B parts individually (each part with its own Gerber file). This way you won't be charged extra for "multiple design in the same file".

The PCB is designed for a thickness of 1.2mm. Don't forget to select 1,2mm PCB thickness when placing the orders.

If you want to use SMD LEDs you need to order the PCB with a 1.2mm thickness , otherwise you won't be able to solder the SMD LEDs.

If you plan to use regular 3mm LEDs and for any reason you want a 1.6 mm thick PCB, you have to adjust the width of those middle cuts (where PCBs interconnect with each other and make them 1.6mm as well).

For a complete assembly guide please check out this instructable : https://www.instructables.com/PCB-Christmas-Tree/

You can find the software sketch there as well.

Have fun 😊!

P.S.: I plan to make a version with CR2032 battery as well, so stay tunned.

Code

PCB Christmas Tree Sketch

C/C++

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#include <avr/wdt.h>


// Define pins for switch the LED, plus the chosen interrupt for reacting to


#define INTERRUPT_PIN PCINT2  // This is PB2 per the schematic
#define DATADIRECTIONPIN DDB2 //page 64 data sheet
#define INT_PIN PB2           // Interrupt pin of choice: PB1 (same as PCINT2) - Pin 7


#define LED_PIN1 PB0           // PB0 - Pin 5
#define LED_PIN2 PB1           // PB1 - Pin 6
#define LED_PIN3 PB3           // PB3 - Pin 2
#define LED_PIN4 PB4           // PB4 - Pin 3


/*
 * Alias for the ISR: "PCINT_VECTOR" (Note: There is only one PCINT ISR. 
 * PCINT0 in the name for the ISR was confusing to me at first, 
 * hence the Alias, but it's how the datasheet refers to it)
 */
#define PCINT_VECTOR PCINT0_vect     


volatile uint8_t pushCount = 0; // variables used within ISR must be declared Volatile.


void setup() {
    cli();                    // Disable interrupts during setup

    DDRB = (1 << LED_PIN1) | (1 << LED_PIN2) 
         | (1 << LED_PIN3) | (1 << LED_PIN4); //replaces pinMode(LED_PIN1, OUTPUT);


    //configuring and enabling the interrupt 

    PCMSK |= (1 << INTERRUPT_PIN);    // Enable interrupt handler (ISR) for our chosen interrupt pin (PCINT1/PB1/pin 6)


    GIMSK |= (1 << PCIE);             // Enable PCINT interrupt in the general interrupt mask


    DDRB &= ~(0 << DATADIRECTIONPIN);  //replaces pinMode(INT_PIN, INPUT);

    PORTB |= (1<< INT_PIN); //disable pull-up. Must hook up pulldown resistor [ 1K ].


    sei();                            // enable interrupts after setup


}


void loop() {


  switch(pushCount){
    case 0 :
    pattern1();
    break;
    case 1 :
    pattern2();
    break;
    case 2 :
    pattern3();
    break;
    case 3 :
    pattern4();
    break;
    default:
    pattern1();
  }


}


// This is the interrupt handler called when there is any change on the INT_PIN
// ISR is defined in the headers - the ATtiny85 only has one handler
ISR(PCINT_VECTOR)
{
    if((PINB >> PINB2)&1!=0) {  // or if ( (PINB & PINB2) != 0 ) or (PINB >> PINB2)&1
      if(pushCount > 3) {
        pushCount = 0;
      }else{
        pushCount ++;
      }   
  }
  delay(50); //small debounce
}


void pattern1(){
  PORTB |= (1 << LED_PIN2) | (1 << LED_PIN4); //replaces digitalWrite(LED_PINx,HIGH);
  delay(150);
  PORTB &= ~((1 << LED_PIN2) | (1 << LED_PIN4)); //replaces digitalWrite(LED_PINx,LOW);
  delay(150);
  PORTB |= (1 << LED_PIN1) | (1 << LED_PIN3); 
  delay(150);
  PORTB &= ~((1 << LED_PIN1) | (1 << LED_PIN3));
  delay(150);
}


void pattern2(){
  PORTB |= (1 << LED_PIN1);
  delay(200);
  PORTB &= ~(1 << LED_PIN1);
  PORTB |= (1 << LED_PIN3);
  delay(200);
  PORTB &= ~(1 << LED_PIN3);
  PORTB |= (1 << LED_PIN2);
  delay(200);
  PORTB &= ~(1 << LED_PIN2);
  PORTB |= (1 << LED_PIN4);
  delay(200);
  PORTB &= ~(1<< LED_PIN4);

}


void pattern3(){
  PORTB |= (1 << LED_PIN2) | (1 << LED_PIN4);
  delay(80);
  PORTB &= ~((1 << LED_PIN2) | (1 << LED_PIN4));
  delay(80);
  PORTB |= (1 << LED_PIN2) | (1 << LED_PIN4);
  delay(80);
  PORTB &= ~((1 << LED_PIN2) | (1 << LED_PIN4));
  delay(80);
  PORTB |= (1 << LED_PIN1) |  (1 << LED_PIN3);
  delay(80);
  PORTB &= ~((1 << LED_PIN1) | (1 << LED_PIN3));
  delay(80);
  PORTB |= (1 << LED_PIN1) |  (1 << LED_PIN3);
  delay(80);
  PORTB &= ~((1 << LED_PIN1) | (1 << LED_PIN3));
  delay(80);
}


void pattern4(){  // POWER OFF
  PORTB &= ~((1 << LED_PIN1) | (1 << LED_PIN2) | (1 << LED_PIN3) | (1 << LED_PIN4)); //LEDs off
  power_off();
}


void power_off()
{
    cli();                               // Disable interrupts before next commands
    wdt_disable();                       // Disable watch dog timer to save power
    set_sleep_mode(SLEEP_MODE_PWR_DOWN); // Set sleep mode power down
    sleep_enable();
    sleep_bod_disable(); // Disable brown-out detector
    sei();               // Enable interrupts
    sleep_cpu();
    sleep_disable();
}

Download Gerbers Download BOM(Bill of materials)

Dec 02,2023

2,803 views

PCB Christmas Tree 2023

PCB Christmas tree, using ATtiny85 / ATtiny13A and TTP223 capacitive sensor

2803

9.00 (1)

Published: Dec 02,2023

Standard PCB

Download Gerber file 30

BOM(Bill of materials)

PCBWay Donate 10% cost To Author

File Last Updated: 2023/12/03 (GMT+8)

File update record

2023-12-0304:04:17

Gerber file is updated.

Only PCB

PCB+Assembly

Add to cart

Project images are for reference only. Actual production is based on the manufacturing files on the project page. Please review the designer's notes (e.g., PCB thickness) and select the appropriate options. PCBWay is not responsible for issues caused by unsuitable parameter selections.
For more important ordering information, please refer to Read More

Copy this HTML into your page to embed a link to order this shared project

Copy