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05I-ONE-Nixie-Clock---Classic-Nixie-Clock-PWM-Fade-In-Out-PWM-Default.ino
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05I-ONE-Nixie-Clock---Classic-Nixie-Clock-PWM-Fade-In-Out-PWM-Default.ino
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// ONE Nixie Clock by Marcin Saj https://nixietester.com
// https://github.com/marcinsaj/ONE-Nixie-Clock
//
// Classic Nixie Clock with PWM fade in/out effect - Default
// Arduino Nano 33 IoT PWM default frequency value is too high
// and "singing tube" audible noise may occur.
//
// This example demonstrates how to set new time, display (time) digits or symbols
// fade in/out effect and fade in/out backlight color effect.
//
// Hardware:
// ONE Nixie Clock Arduino Shield - https://nixietester.com/project/one-nixie-clock
// Arduino Nano 33 IoT - https://store.arduino.cc/arduino-nano-33-iot
//
// NOTE: For Arduino Nano 33 IoT use 3.3V power settings on the clock motherboard (VCC jumper)
//
// Nixie Tube Socket - https://bit.ly/nixie-socket & https://bit.ly/NixieSocket-Project
// Nixie Power Supply module and RTC DS3231 module
// Nixie Clock require 12V, 1.5A power supply
// Schematic ONE Nixie Clock - http://bit.ly/ONE-Nixie-Clock-Schematic
// Schematic Nixie Power Supply Module - http://bit.ly/ONE-Nixie-Clock-NPS-Module
// DS3231 RTC datasheet: https://datasheets.maximintegrated.com/en/ds/DS3231.pdf
#include <Adafruit_NeoPixel.h>
// https://github.com/adafruit/Adafruit_NeoPixel
// https://learn.adafruit.com/adafruit-neopixel-uberguide/arduino-library-use
#include <RTClib.h>
// https://github.com/adafruit/RTClib
// RTC library declaration
RTC_DS3231 rtc;
// Choose Time Format *******************************************************
#define hourFormat 12 // 12 Hour Clock or 24 Hour Clock
// **************************************************************************
// NeoPixels LEDs pin
#define LED_PIN A3
// Number of NeoPixels LEDs
#define LED_COUNT 4
// Declare our NeoPixel led object:
Adafruit_NeoPixel led(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
// Argument 1 = Number of pixels
// Argument 2 = Arduino pin number
// Argument 3 = Pixel type flags:
// NEO_KHZ800 800 KHz bitstream for WS2812 LEDs
// NEO_GRB Pixels are wired for GRB bitstream
uint32_t hour_color = led.Color(0, 0, 255); // Blue color
uint32_t minute_color = led.Color(0, 255,0); // Green color
// Shift registers control pins
#define DIN_PIN A0
#define EN_PIN A1
#define CLK_PIN A2
// Nixie Power Supply Module control pin
#define EN_NPS_PIN 13
// PWM pin for nixie tube fade effect
#define PWM_PIN 10
// The clock has a built-in detection mechanism
// for 15 segment nixie tubes (e.g. B-7971, B-8971)
#define DETECT_PIN A6
int analogDetectInput = 0;
// Serial monitor state
boolean serialState = 0;
// Bit numbers
//
// 8
// ___________
// |\ | /|
// | \ |0 / |
// 9 | 1\ | /7 | 13
// | \ | / |
// |____\|/____|
// | 2 /|\ 6 |
// | / | \ |
// 10 | / |4 \ | 12
// | /3 | 5\ |
// |/ | \|
// ¯¯¯¯¯¯¯¯¯¯¯
// 11
// /¯¯¯¯¯¯¯¯¯\
// 14
// ______________________
// | SOCKET 20A, 24A, 26A |
// ¯¯¯¯¯|¯¯¯¯¯¯¯¯¯¯|¯¯¯¯¯
// Bit notation of 15-segment tube symbols
uint16_t symbol_nixie_tube[]={
0b0011111110001000, // 0
0b0000000000010001, // 1
0b0010100101001000, // 2
0b0001100111000000, // 3
0b0011001001000100, // 4
0b0000101100100100, // 5
0b0001111101000100, // 6
0b0000000110010000, // 7
0b0011111101000100, // 8
0b0011101101000100, // 9
0b0011011101000100, // A
0b0011100101010001, // B
0b0000111100000000, // C
0b0011100100010001, // D
0b0000111100000100, // E
0b0000011100000100, // F
0b0001111101000000, // G
0b0011011001000100, // H
0b0000100100010001, // I
0b0011110000000000, // J
0b0000011010100100, // K
0b0000111000000000, // L
0b0011011010000010, // M
0b0011011000100010, // N
0b0011111100000000, // O
0b0010011101000100, // P
0b0011111100100000, // Q
0b0010011101100100, // R
0b0001101101000100, // S
0b0000000100010001, // T
0b0011111000000000, // U
0b0000011010001000, // V
0b0011011000101000, // W
0b0000000010101010, // X
0b0000000010001010, // Y
0b0000100110001000 // Z
};
// Bit notation of 10-segment tube digits
uint16_t digit_nixie_tube[]={
0b0000000000000001, // 0
0b0000000000000010, // 1
0b0000000000000100, // 2
0b0000000000001000, // 3
0b0000000000010000, // 4
0b0000000000100000, // 5
0b0000000001000000, // 6
0b0000000010000000, // 7
0b0000000100000000, // 8
0b0000001000000000 // 9
};
/*
// Bit notation of 7-segment tube digits
// Socket no.29, MG-17G nixie tube
uint16_t digit_nixie_tube[]={
0b0000000001110111, // 0
0b0000000000100100, // 1
0b0000000001011101, // 2
0b0000000001101101, // 3
0b0000000000101110, // 4
0b0000000001101011, // 5
0b0000000001111011, // 6
0b0000000000100101, // 7
0b0000000001111111, // 8
0b0000000001101111 // 9
};
*/
void setup()
{
Serial.begin(9600);
rtc.begin();
led.begin(); // Initialize NeoPixel led object
led.show(); // Turn OFF all pixels ASAP
led.setBrightness(255); // Set brightness 0-255
delay(5000);
pinMode(EN_NPS_PIN, OUTPUT);
digitalWrite(EN_NPS_PIN, HIGH); // Turn OFF nixie power supply module
pinMode(EN_PIN, OUTPUT);
digitalWrite(EN_PIN, LOW);
pinMode(CLK_PIN, OUTPUT);
digitalWrite(CLK_PIN, LOW);
pinMode(DIN_PIN, OUTPUT);
digitalWrite(DIN_PIN, LOW);
pinMode(PWM_PIN, OUTPUT);
digitalWrite(PWM_PIN, LOW);
Serial.println("##############################################################");
Serial.println("------------ Test Example - Classic Nixie Clock --------------");
Serial.println("---------------- If you want to set new Time -----------------");
Serial.println("----------- press ENTER for Arduino IDE up to 1.8 ------------");
Serial.println("----------- press CTRL+ENTER for Arduino IDE 2.0 -------------");
// Millis time start
unsigned long millis_time_now = millis();
unsigned long millis_time_now_2 = millis();
// Wait 5 seconds
while((millis() < millis_time_now + 10000))
{
// Print progress bar
if (millis() - millis_time_now_2 > 160)
{
Serial.print("#");
millis_time_now_2 = millis();
}
// Set serialState flag if time settings have been selected
if(Serial.available() > 0)
{
serialState = 1;
break;
}
}
Serial.println('\n');
// Clear serial buffer
while(Serial.available())
Serial.read();
if(serialState == 0)
{
// Turn on the nixie power module if settings have not been selected
digitalWrite(EN_NPS_PIN, LOW);
}
}
void loop()
{
// Set a new time if settings have been selected
if(serialState == 1)
{
SetNewTime();
serialState = 0;
// Turn ON nixie power supply module
digitalWrite(EN_NPS_PIN, LOW);
}
// Get time from RTC and display on nixie tubes
DisplayTime();
delay(2000);
}
void SetNewTime()
{
Serial.println("--------------- Enter the TIME without spaces ----------------");
Serial.println("--------------- in the HHMM format e.g. 0923 -----------------");
Serial.println("------- and when you are ready to send data to the RTC -------");
Serial.println("------------ press ENTER for Arduino IDE up to 1.8 -----------");
Serial.println("------------ press CTRL+ENTER for Arduino IDE 2.0 ------------");
Serial.println('\n');
// Clear serial buffer
while(Serial.available())
Serial.read();
// Wait for the values
while (!Serial.available()) {}
// Read time as an integer value
int hhmm_time = Serial.parseInt();
// Extract minutes and hours
byte timeSecond = 0;
byte timeMinute = (hhmm_time / 1) % 100;
byte timeHour = (hhmm_time / 100) % 100;
rtc.adjust(DateTime(0, 0, 0, timeHour, timeMinute, 0));
}
void DisplayTime()
{
DateTime now = rtc.now();
byte timeHour = now.hour();
byte timeFormat = hourFormat;
// Check time format and adjust
if(timeFormat == 12 && timeHour > 12) timeHour = timeHour - 12;
if(timeFormat == 12 && timeHour == 0) timeHour = 12;
byte timeMinute = now.minute();
byte timeSecond = now.second();
Serial.print("Time: ");
if(timeHour < 10) Serial.print("0");
Serial.print(timeHour);
Serial.print(":");
if(timeMinute < 10) Serial.print("0");
Serial.print(timeMinute);
Serial.print(":");
if(timeSecond < 10) Serial.print("0");
Serial.println(timeSecond);
int digit;
// Extract individual digits
digit = (timeHour / 10) % 10;
NixieDisplay(digit, hour_color);
digit = (timeHour / 1) % 10;
NixieDisplay(digit, hour_color);
delay(400);
digit = (timeMinute / 10) % 10;
NixieDisplay(digit, minute_color);
digit = (timeMinute / 1) % 10;
NixieDisplay(digit, minute_color);
}
// If a high state appears on the analog input,
// it means that a multi-segment tube socket has been inserted
bool DetectNixieTube()
{
analogDetectInput = analogRead(DETECT_PIN);
// 0 - 1024, Detecting anything above 0 means true
// 950 is for sure
if(analogDetectInput >= 950) return(true);
else return(false);
}
void NixieDisplay(uint16_t digit, uint32_t backlight_color)
{
if(DetectNixieTube() == true) ShowSymbol(digit, backlight_color);
else ShowDigit(digit, backlight_color);
}
// PWM fade in/out effect
void ShowDigit(uint16_t digit, uint32_t backlight_color)
{
ShiftOutData(digit_nixie_tube[digit]);
// Fade-in from min to max
for (int i = 255 ; i >= 0; i = i -5)
{
analogWrite(PWM_PIN, i);
led.setBrightness(255 - i); // Set brightness
led.fill(backlight_color); // Fill all LEDs with a color
led.show(); // Update LEDs
// wait for 8 milliseconds to see the fade in effect
delay(8);
}
delay(500);
// Fade-out from max to min
for (int i = 0 ; i <= 255; i = i +5)
{
analogWrite(PWM_PIN, i);
led.setBrightness(255 - i); // Set brightness
led.fill(backlight_color); // Fill all LEDs with a color
led.show(); // Update LEDs
// wait for 8 milliseconds to see the fade out effect
delay(8);
}
ClearNixieTube();
}
// PWM fade in/out effect
void ShowSymbol(uint16_t digit, uint32_t backlight_color)
{
ShiftOutData(symbol_nixie_tube[digit]);
// fade in from min to max in decrements of 5 points
for (int i = 255 ; i >= 0; i = i -5)
{
analogWrite(PWM_PIN, i);
led.setBrightness(255 - i); // Set brightness
led.fill(backlight_color); // Fill all LEDs with a color
led.show(); // Update LEDs
// wait for 10 milliseconds to see the fade in effect
delay(10);
}
delay(500);
// fade out from max to min in increments of 5 points
for (int i = 0 ; i <= 255; i = i +5)
{
analogWrite(PWM_PIN, i);
led.setBrightness(255 - i); // Set brightness
led.fill(backlight_color); // Fill all LEDs with a color
led.show(); // Update LEDs
// wait for 10 milliseconds to see the fade out effect
delay(10);
}
ClearNixieTube();
}
// Turn off nixie tube
void ClearNixieTube()
{
ShiftOutData(0);
}
void ShiftOutData(uint16_t character)
{
uint8_t first_half = character >> 8;
uint8_t second_half = character;
digitalWrite(EN_PIN, LOW);
shiftOut(DIN_PIN, CLK_PIN, MSBFIRST, first_half);
shiftOut(DIN_PIN, CLK_PIN, MSBFIRST, second_half);
// Return the latch pin high to signal chip that it
// no longer needs to listen for information
digitalWrite(EN_PIN, HIGH);
}