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 31 
 on: March 27, 2014, 09:50:01 PM 
Started by blave549 - Last post by blave549
I have been messing around with various I2C serial interface'd gizmos with Arduino, and it has occurred to me that V2 of the Arduinix board should have an I2C interface, to reduce the number of Ard pins that are required to drive the board. Have you considered this at all?

I would buy one ;^) .

cheers,

Dave.

 32 
 on: March 26, 2014, 01:40:04 PM 
Started by bcage - Last post by linux-works
I noticed on your video that the '1' char has a blue dot on it.  I've heard of this problem before.

have you tried to fix this?  have you tried actual 74141 chips?

I'd love to have some in18's but the 'blue dot' thing really turns me off.


 33 
 on: March 24, 2014, 10:39:26 AM 
Started by RJTPMP - Last post by RJTPMP
Has anyone tried using the IN-16 tubes? I'm working on mine now, but my first setup doesn't seem to work.  I think I just have the voltage set too low. I plan on getting back to it at some point this week if all goes well.

 34 
 on: March 21, 2014, 06:23:28 PM 
Started by philgrocks - Last post by philgrocks
http://youtu.be/zymtnFY4H9A

I am using the ArduiNIX and an Arduino YUN (It has a network co-processor) and with that I am able to get network time.  The Nixie clock self sets itself and also adjusts for DST/PST automatically.

I separated out the anodes for the two tubes so I could shut off a tube in the case where the leading digit of the hour is Zero.

I added floor lighting using 2n2222 transistors and blue LEDs.   Controllable as well by the software.

The display sends out  HOURS -> MINUTES -> Pause -> MONTH -> DAY -> YEAR -> Pause and repeat.

The code will turn off the display at night.

---
Here is the code for the Arduino YUN, enjoy

Code attached... Enjoy

 35 
 on: March 18, 2014, 08:18:12 PM 
Started by bcage - Last post by philgrocks
I checked two two pins for continuity on the IN-18 and they are connected.

I just wired up 2 IN-18 to my Ardruinix.   I used only one anode and everything looks fine.

Phil


 36 
 on: March 18, 2014, 12:41:55 PM 
Started by waldo1979 - Last post by waldo1979
It seems to be only the first two tubes that are ghosting which are connected to the same cathode/shift register. I did some debugging where i disconnected various cathode pins to determine if there was a short but that was uneventful.  I'll do some more testing and get back to you.

 37 
 on: March 17, 2014, 06:35:18 PM 
Started by waldo1979 - Last post by nonentity
Apparently the ghosting has nothing to do with sharing an anode. I finally finished my software and when i display 5:00PM there is a ghost in the first hour digit (which is disabled):


Based on other post's i've seen the shift registers are probably the cause.

Well, normally when they ghost like that, if it's a driver chip issue, that usually means they always fire multiple tube elements, AND they exhibit the same error across more than one tube.  Meaning, if say, your first two digits share the same driver chip, both those tubes would ghost.

It seems like there may be a short on the cathode side, can you tell me which numerals ghost? if it's all of them, or just one or two?


If a driver chip is bad, that would mean any tube associated with it would ghost, or display a jumble of numerals.

 38 
 on: March 17, 2014, 06:06:21 PM 
Started by waldo1979 - Last post by waldo1979
Apparently the ghosting has nothing to do with sharing an anode. I finally finished my software and when i display 5:00PM there is a ghost in the first hour digit (which is disabled):


Based on other post's i've seen the shift registers are probably the cause.

 39 
 on: March 17, 2014, 11:41:18 AM 
Started by waldo1979 - Last post by waldo1979
Here's a picture of the ghosting i was talking about. This happens when i'm only illuminating the neon tubes (the cathodes for the nixie tube are all OFF/LOW state... shift register is 1/1/1/1):


Here's a picture with all the nixie + neon tubes illuminated with a 1ms delay. There's no ghosting but the MOSFET is too hot (laser temp is 140F). This is bound to cause the neighboring ceramic caps to fail.

 40 
 on: March 16, 2014, 07:10:52 PM 
Started by waldo1979 - Last post by nonentity
Hello,
     I'm building clock with four IN-4 and INS-1 Neon Tube colons. I have everything wired but i'm having some issues with the MOSFET heating up and an issue where voltage is leaking to cathodes. For example, anode2 is shared by a nixie tube (cathode1) and the INS-1 colon (cathode1). When i fire the colon, some voltage is bleeding through to the nixie tube.

    I'm wondering if i damaged the SN74141's. I didnt' have any sockets on hand and impatiently solder'd them directly.

    FYI, here's a link to my Driver software. Still a work in progress. If the C++ pattern ends up being too slow i'll re-write it in C-style code:
https://github.com/waldo1979/WitchingHour

-Waldo

Can you tell me a bit about your setup?

Do the tube and colon share a common anode as well?
Are they both resistored on the anode?

Try different anode channel per unit. And use the multiplexing to gate them.

Below is a table describing my tube wiring. The nixies have a 10k resistor on the anodes and the neons are connected in series with a 47k resistor. When I illuminate the neon tubes (colon) and leave it on the Nixie->hour2 has a ghost. Using a different anodes have the same effect. if i illuminate in a loop with a delay the ghosting isnt visible.

The wiring to the tubes is AWG 28 (http://amzn.com/B007R9SQQM), which might be a little small. The tubes are socketed using sockets from Germany i bought off ebay: http://www.ebay.com/itm/331114980365

When the neon tube is illuminated, if i take a voltage reading from the cathode pins which are supposed to be in the off/low state and ground there is 140~ volts. I checked for shorts but didn't see any. Seems like the problem lies within the shift registers.

Anode1Nixie->Hour1
Anode2Nixie->Hour2, Neon Tubes
Anode3Nixie->minute1
Anode4Nixie->minute2
Cathode0Nixie->hour1, Nixie->hour2
Cathode1Nixie->Minute1, Nixie->Minute2, Neon Tubes



First off, if you don't have your neon lamps equipped with a resistor for EACH anode per each lamp, you will have a bit of trouble there.  I've seen ghosting and other odd results when multiple neon lamps use unresistored anodes.

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