I'm running two nixies from a shift register. For this I need to output a binary number between 0 and 9 on shift register pins 0-3 (which I can do), and a second number between 0-9 on shift register pins 4-7.
How do I add the two numbers together so that they output as two separate digits? I guess it'd be binary but I don't really know where to start.
I believe you would use the "<<" or ">>" operand.
Tell us if it works!
Yes! Thank you! I'm well excited now!
This is my nixie post: Nixies: stupid questions. - #36 by cowjam - Displays - Arduino Forum
It works counting up from 0 to 99, using this code (where all the variables are integers):
void loop()
{
int delayTime = 1000;
for (counter = 0; counter < 100; counter++)
{
units = counter % 10;
tens = (counter - units) / 10;
shifter = (units << 4) + tens;
Serial.println(shifter);
digitalWrite(latch, LOW);
shiftOut(data, clock, MSBFIRST, shifter);
digitalWrite(latch, HIGH);
delay(delayTime);
}
}
Your Welcome. What are the nixies for? How much do they cost?
baum:
Your Welcome. What are the nixies for? How much do they cost?
About £20 for 12 x IN-12 with socket and 74141, another £10 for the 12v-180v PSU.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=400169956004&ssPageName=STRK:MEWNX:IT
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=250747824418&ssPageName=STRK:MEWNX:IT
What am I using them for? Displaying numbers! 
They're just for playing with at the moment. Tonight I'll be adding a rotary encoder and (hopefully) making a safe style lock mechanism using the nixies to display the currently dialled number.
If you got larger ones you could make a sick clock! (or count-down clock, for that matter...!)
It's a matter of finding a suitable box for a clock. I'm still looking, I keep calling in to charity shops but the ones round here (Wigan, UK) are crap.