http://www.thingiverse.com/thing:52252
I bought all the goodies to make a nice Nixie clock from Taylor Electronics, but I didn't have a nice case for it. It took me about 6 hours to design, cut, and re-cut parts until I had something I was happy with. I disabled the I2C master on the first TES 1361 SmartNixie board and replaced it with an Arduino Nano board connected in the unused RTC connector on the bottom of the backplane board. I poll the GPS RTC board via I2C to get the time and then send command over the I2C bus to the SmartNixie boards to display the digits.
Laser cut parts from 1/8 acrylic (The stuff I bought from Home Depot ended up being 2.2mm thick and not 3.175mm(1/8") so this drawing was designed for 2.2mm, but that isn't hard to change.)
Order these parts from http://www.tayloredge.com/storefront/index.html
1 x 1392 - 6 Digit IN18 Clock Backplane
6 x 1361 - SmartNixie IN18
1 x 1375 - SmartNixie GPS RTC
1 x 1364 - SmartNixie HVPS-H
1 x Active GPS Antenna
1 x Power Plug
I ordered my IN-18 tubes from super-gene on ebay: http://myworld.ebay.com/super-gene/
6 x IN-18 tubes
12V power supply and Arduino Nano can be ordered from Amazon here:
http://www.amazon.com/Wall-Adapter-Power-Supply-12VDC/dp/B006GEPUYA
http://www.amazon.com/Arduino-ARD-NANO30-Nano-v3-0/dp/B003YVL34O
Arduino Sketch:
// Smart Nixie
// by Jason Garland <http://www.jasongarland.com>
#include <Wire.h>
#include <SeeedOLED.h>
#include <avr/pgmspace.h>
#include "DHT.h"
#define DHTPIN 2 // what pin Temperature sensor is connected to
#define DHTTYPE DHT22 // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE);
byte tube[6]={0x0E, 0x0C, 0x0B, 0x0A, 0x09, 0x08};
char tubestate[7];
byte gps[14];
int tzoffset=-8;
char digit[7];
unsigned long counter=999999;
#define LEDPIN 13
int ledstate=0;
unsigned long lasttick = millis();
unsigned long lastdht = millis();
void setup()
{
Serial.begin(38400);
Serial.println("Starting up");
pinMode(A4, INPUT_PULLUP);
pinMode(A5, INPUT_PULLUP);
pinMode(LEDPIN, OUTPUT);
dht.begin();
Wire.begin(); // join i2c bus (address optional for master)
SeeedOled.init(); //initialze SEEED OLED display
DDRB|=0x21;
PORTB |= 0x21;
SeeedOled.setBrightness(255);
SeeedOled.clearDisplay(); // clear the screen and set start position to top left corner
SeeedOled.setNormalDisplay(); //Set display to normal mode (i.e non-inverse mode)
SeeedOled.setPageMode(); //Set addressing mode to Page Mode
SeeedOled.setTextXY(1,0); //Set the cursor to Xth Page, Yth Column
SeeedOled.putString("Humidity:"); //Print the String "Hello World!"
SeeedOled.setTextXY(3,0); //Set the cursor to Xth Page, Yth Column
SeeedOled.putString("Temperature:"); //Print the String "Hello World!"
SeeedOled.setTextXY(5,0); //Set the cursor to Xth Page, Yth Column
SeeedOled.putString("Time: "); //Print the String "Hello World!"
init_gps(); // Initialize the GPS
//Set brightness on all tubes to 100%
for (int i=5; i>=0; i-- ){ setbrightness(i, 100); }
}
void loop() {
// Update once per 10th second
if (millis() - lasttick >= 100) {
lasttick = millis();
if ( random(1000) == 42) { pinball(); }
read_gps_time(digit);
update_display(digit);
SeeedOled.setTextXY(6,2);
SeeedOled.putString(digit);
}
update_oled_dht();
//Serial.println(counter);
//delay(1000);
//update_display(counter--);
}
void read_gps_time(char* digit_buffer) {
//int bytes=128;
int bytes=6;
Wire.requestFrom(81, bytes); // request 14 bytes from slave device #81
int i=0;
while(Wire.available()) // slave may send less than requested
{
gps[i]=Wire.read();
i++;
}
char buffer[((bytes * 3) + 1)];
for(int j=0;j<bytes;j++){
sprintf(buffer+(j*3), "%02X ", gps[j]);
}
//Serial.println(buffer);
char hourbuffer[3];
int hour;
sprintf(hourbuffer, "%02X", gps[2]);
hour=atoi(hourbuffer);
//hour+=tzoffset;
if(hour < 0) {
hour+=24;
}
sprintf(digit_buffer,"%02d%02X%02X", hour, gps[1], gps[0]);
//Serial.println(digit_buffer);
}
void setbrightness(int place, int brightness) {
Wire.beginTransmission(tube[place]); // seconds 1s
Wire.write(byte(0x0B)); //register address=dimmer
Wire.write(brightness); //dimmer=50%
Wire.endTransmission(); // stop transmitting
}
void update_display(unsigned long number){
char digit_buffer[7];
sprintf(digit_buffer, "%06lu",number%1000000);
update_display((char *)&digit_buffer);
}
void update_display(char* digit_buffer)
{
for (int i=5; i>=0; i-- ){
if ( tubestate[i]!=digit_buffer[i] ){
display_digit(i, digit_buffer[i]);
/*
Serial.print(tubestate[i]);
Serial.print(" ");
Serial.println(digit_buffer[i]);
//*/
//fade_digit(i, tubestate[i], digit_buffer[i]);
tubestate[i]=digit_buffer[i];
}
}
Serial.print("digit_buffer: ");
Serial.println(digit_buffer);
Serial.print("tubestate: ");
Serial.println(tubestate);
//*/
}
void fade_digit(int place, byte old_value, byte new_value){
for (int b=100; b>=30; b-=2 ){
Wire.beginTransmission(tube[place]); // seconds 1s
Wire.write(byte(0x0B)); //register address=dimmer
Wire.write(b); //dimmer=50%
Wire.endTransmission(); // stop transmitting
delay(20);
}
Wire.beginTransmission(tube[place]); // tube
Wire.write(byte(0x00)); //set display
Wire.write(new_value-0x30); //display digit
Wire.endTransmission(); // stop transmitting
for (int c=30; c<100; c+=2 ){
Wire.beginTransmission(tube[place]); // seconds 1s
Wire.write(byte(0x0B)); //register address=dimmer
Wire.write(c); //dimmer=50%
Wire.endTransmission(); // stop transmitting
delay(20);
}
/*
for(int i=0; i<200; i++) {
display_digit(place, old_value);
for(int j=0; j<(200-i); j++) {
delayMicroseconds(1);
}
display_digit(place, new_value);
for(int j=0; j<i; j++) {
delayMicroseconds(4);
}
}
display_digit(place, new_value);
*/
}
void display_digit(int place, byte value) {
if ( place == 5 ) { blink_led(); } // blink Arduino LED when the seconds digit increments
Wire.beginTransmission(tube[place]); // tube
Wire.write(byte(0x00)); //set display
Wire.write(value-0x30); //display digit
Wire.endTransmission(); // stop transmitting
}
void init_gps() {
delay(500);
Wire.beginTransmission(byte(0x51)); // Write to GPS
Wire.write(byte(0x3C)); //set DL value
//Wire.write(byte(0x12)); //Set DL for Daylight Savings off
Wire.write(byte(0x22)); //Set DL for Daylight Savings on +1 hour
Wire.write(byte(0x08)); //set timezone hour offset to -8
Wire.endTransmission(); // stop transmitting
/*
Wire.beginTransmission(byte(0x51)); // Write to GPS
Wire.write(byte(0x3D)); //set timezone offset
Wire.write(byte(0x08)); //set timezone hour offset to -8
Wire.endTransmission(); // stop transmitting
*/
Wire.beginTransmission(byte(0x51)); // Write to GPS
Wire.write(byte(0x02)); //start address 0x02
Wire.endTransmission(); // stop transmitting
}
void blink_led() {
ledstate = ~ledstate;
digitalWrite(LEDPIN, ledstate);
}
void pinball() {
char digit_buffer[6];
for (int i=0; i<100; i++ ){
sprintf(digit_buffer, "%06lu", random(1000000));
delay(50);
update_display(digit_buffer);
if (millis() - lasttick >= 100) {
lasttick = millis();
read_gps_time(digit);
SeeedOled.setTextXY(6,2);
SeeedOled.putString(digit);
}
}
}
//Celsius to Fahrenheit conversion
double Fahrenheit(double celsius)
{
return 1.8 * celsius + 32;
}
void update_oled_time() {
}
void update_oled_dht() {
if (millis() - lastdht >= 10000) {
lastdht = millis();
float h = dht.readHumidity();
float t = dht.readTemperature();
//SeeedOled.setTextXY(1,0); //Set the cursor to Xth Page, Yth Column
//SeeedOled.putString("Humidity:"); //Print the String "Hello World!"
SeeedOled.setTextXY(2,2); //Set the cursor to Xth Page, Yth Column
SeeedOled.putNumber(h); //Print the String
SeeedOled.putString("%");
//SeeedOled.setTextXY(3,0); //Set the cursor to Xth Page, Yth Column
//SeeedOled.putString("Temperature:"); //Print the String "Hello World!"
SeeedOled.setTextXY(4,2); //Set the cursor to Xth Page, Yth Column
SeeedOled.putNumber(Fahrenheit(t)); //Print the number
SeeedOled.putString(" F");
}
}
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