I have debugged the code for the colon to light for one second on, one second off. Just a quick side note: The INS-1 bulbs do not light at the 180V needed to drive the SZ-8 that I used. They require a much lower voltage of 65-95V to start and no more than 55V to run. Mine burned out.
// SN74141 : True Table
//D C B A #
//L,L,L,L 0
//L,L,L,H 1
//L,L,H,L 2
//L,L,H,H 3
//L,H,L,L 4
//L,H,L,H 5
//L,H,H,L 6
//L,H,H,H 7
//H,L,L,L 8
//H,L,L,H 9
// SN74141 (1)
int ledPin_0_a = 2;
int ledPin_0_b = 3;
int ledPin_0_c = 4;
int ledPin_0_d = 5;
// SN74141 (2)
int ledPin_1_a = 6;
int ledPin_1_b = 7;
int ledPin_1_c = 8;
int ledPin_1_d = 9;
// anod pins
int ledPin_a_1 = 10;
int ledPin_a_2 = 11;
int ledPin_a_3 = 12;
void setup()
{
pinMode(ledPin_0_a, OUTPUT);
pinMode(ledPin_0_b, OUTPUT);
pinMode(ledPin_0_c, OUTPUT);
pinMode(ledPin_0_d, OUTPUT);
pinMode(ledPin_1_a, OUTPUT);
pinMode(ledPin_1_b, OUTPUT);
pinMode(ledPin_1_c, OUTPUT);
pinMode(ledPin_1_d, OUTPUT);
pinMode(ledPin_a_1, OUTPUT);
pinMode(ledPin_a_2, OUTPUT);
pinMode(ledPin_a_3, OUTPUT);
// NOTE:
// You can add a input here to for setting the time
}
////////////////////////////////////////////////////////////////////////
//
// DisplayNumberSet
// Use: Passing anod number, and number for bulb 1 and bulb 2, this function
// looks up the truth table and opens the correct outs from the arduino
// to light the numbers given to this funciton (num1,num2).
// On a 6 nixie bulb setup.
//
////////////////////////////////////////////////////////////////////////
void DisplayNumberSet( int anod, int num1, int num2 )
{
int anodPin;
int a,b,c,d;
// set defaults.
a=0;b=0;c=0;d=0; // will display a zero.
anodPin = ledPin_a_1; // default on first anod.
// Select what anod to fire.
switch( anod )
{
case 0: anodPin = ledPin_a_1; break;
case 1: anodPin = ledPin_a_2; break;
case 2: anodPin = ledPin_a_3; break;
}
// Load the a,b,c,d.. to send to the SN74141 IC (1)
// 1=H, 0=L. Truth Table
switch( num1 )
{
case 0: a=0;b=0;c=0;d=0;break;
case 1: a=1;b=0;c=0;d=0;break;
case 2: a=0;b=1;c=0;d=0;break;
case 3: a=1;b=1;c=0;d=0;break;
case 4: a=0;b=0;c=1;d=0;break;
case 5: a=1;b=0;c=1;d=0;break;
case 6: a=0;b=1;c=1;d=0;break;
case 7: a=1;b=1;c=1;d=0;break;
case 8: a=0;b=0;c=0;d=1;break;
case 9: a=1;b=0;c=0;d=1;break;
}
// Write to output pins.
digitalWrite(ledPin_0_d, d);
digitalWrite(ledPin_0_c, c);
digitalWrite(ledPin_0_b, b);
digitalWrite(ledPin_0_a, a);
// Load the a,b,c,d.. to send to the SN74141 IC (2)
switch( num2 )
{
case 0: a=0;b=0;c=0;d=0;break;
case 1: a=1;b=0;c=0;d=0;break;
case 2: a=0;b=1;c=0;d=0;break;
case 3: a=1;b=1;c=0;d=0;break;
case 4: a=0;b=0;c=1;d=0;break;
case 5: a=1;b=0;c=1;d=0;break;
case 6: a=0;b=1;c=1;d=0;break;
case 7: a=1;b=1;c=1;d=0;break;
case 8: a=0;b=0;c=0;d=1;break;
case 9: a=1;b=0;c=0;d=1;break;
}
// Write to output pins
digitalWrite(ledPin_1_d, d);
digitalWrite(ledPin_1_c, c);
digitalWrite(ledPin_1_b, b);
digitalWrite(ledPin_1_a, a);
// Turn on this anod.
digitalWrite(anodPin, HIGH);
// Delay
// NOTE: With the differnce in Nixie bulbs you may have to change
// this delay to set the update speed of the bulbs. If you
// dont wait long enough the bulb will be dim or not light at all
// you want to set this delay just right so that you have
// nice bright output yet quick enough so that you can multiplex with
// more bulbs.
delay(3);
// Shut off this anod.
digitalWrite(anodPin, LOW);
}
////////////////////////////////////////////////////////////////////////
//
// DisplayNumberString
// Use: passing an array that is 8 elements long will display numbers
// on a 6 nixie bulb setup.
//
////////////////////////////////////////////////////////////////////////
void DisplayNumberString( int* array )
{
// bank 1 (bulb 0,3)
DisplayNumberSet(0,array[0],array[3]);
// bank 2 (bulb 1,4)
DisplayNumberSet(1,array[1],array[4]);
// bank 3 (bulb 2,5)
DisplayNumberSet(2,array[2],array[5]);
}
// Defines
long MINS = 60; // 60 Seconds in a Min.
long HOURS = 60 * MINS; // 60 Mins in an hour.
long DAYS = 24 * HOURS; // 24 Hours in a day. > Note: change the 24 to a 12 for non millitary time.
long runTime = 0; // Time from when we started.
//************************************
long previous = 0;
long interval = 1000;
int colon = 1;
//************************************
// default time sets. clock will start at 12:59:00
// NOTE: We start seconds at 0 so we dont need a clock set
// The values you see here would be what you change
// if you added a set clock inputs to the board.
long clockHourSet = 12;
long clockMinSet = 59;
////////////////////////////////////////////////////////////////////////
//
//
////////////////////////////////////////////////////////////////////////
void loop()
{
// Get milliseconds.
runTime = millis();
// Get time in seconds.
long time = (runTime) / 1000;
// Set time based on offset..
long hbump = 60*60*clockHourSet;
long mbump = 60*clockMinSet;
time += mbump + hbump;
// Convert time to days,hours,mins,seconds
long days = time / DAYS; time -= days * DAYS;
long hours = time / HOURS; time -= hours * HOURS;
long minutes = time / MINS; time -= minutes * MINS;
long seconds = time;
//*****************************
unsigned long current = millis();
if( (current - previous) > interval)
{
previous = current;
if (colon == 0)
{
colon = 1;
}
else
{
colon = 0;
}
}
//*****************************
// Get the high and low order values for hours,min,seconds.
int lowerHours = hours % 10;
int upperHours = hours - lowerHours;
int lowerMins = minutes % 10;
int upperMins = minutes - lowerMins;
int lowerSeconds = seconds % 10;
int upperSeconds = seconds - lowerSeconds;
if( upperSeconds >= 10 ) upperSeconds = upperSeconds / 10;
if( upperMins >= 10 ) upperMins = upperMins / 10;
if( upperHours >= 10 ) upperHours = upperHours / 10;
// Fill in the Number array used to display on the tubes.
int NumberArray[6]={0,0,0,0,0,0};
NumberArray[0] = upperHours; //
NumberArray[4] = lowerHours; //
NumberArray[2] = upperMins; //
NumberArray[3] = lowerMins; //
NumberArray[1] = colon; //Digit 4, wire 0
// Display.
DisplayNumberString( NumberArray );
}
This is a modified 6 bulb sketch. I modified the array to suit my tubes. If anyone has any additions, it would be greatly appreciated.
