Marius M

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Alexis Gimeno

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Максим Maxbolt

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Néstor

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Dec 02,2023

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PCB Christmas Tree 2023

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

1652

9.00 (1)

Published: Dec 02,2023

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

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2023-12-0304:04:17

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Topic

DIY Electronics

Blinkenlights

Christmas2023

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Nice Improvement over the traditional version. I like the touch sensor and alternate flash modes, along with the circle cutouts for the LEDs.

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Dec 12,20231 Comments
Marius M 2023-12-13 17:33:04Reply
Glad you like it :) ! The idea is now necessarily new but, I adapt it to fit my needs and also my skills. I will solder one with 3mm LEDs as well, and put some pictures here, just so you guys can compare the look of both versions. I know I definitely like more the SMD version, but I have to admit, IS A PAIN to solder the LEDs. The PCB is 1.2mm thick and the 1206LED is 1.6mm, so you have 0.4 mm of surface.
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	#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();
	}

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