[neonixie-l] Re: Seven digit Nixie project

[Mitch]

Greg, I don't plan on keeping it that way, except maybe the smaller Z570M 
series for seconds. I'll see how it looks. 

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[neonixie-l] Re: Seven digit Nixie project

[gregebert]

Thanks for the picture. I dont see many clocks that use different tubes.

I'm going to take this as a suggestion and see how it looks on my big clock.

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[neonixie-l] Re: Seven digit Nixie project

[Mitch]

One rescue, one foster. Zev and Sabina.

On Sunday, September 13, 2015 at 9:58:07 PM UTC-4, MichaelB wrote:
>
> Somebody has a Greyhound...
>
> On Sunday, September 13, 2015 at 10:10:41 AM UTC-7, Mitch wrote:
>>
>> This is the final version, although I'm still finding software bugs!
>>
>> Tubes left to right are IN-14, IN-8-2, three Z573M, IN-12B, and National 
>> NL-8522. 
>>
>> I plan on building eight clocks for family and friends. With top view 
>> tubes, I'll use INS-1 neons.
>>
>> A matching acrylic cover fits on base.
>>
>> Thanks to everyone who helped with advice and suggestions.
>>
>> Mitch
>>
>> On Wednesday, July 15, 2015 at 8:35:06 PM UTC-4, Mitch wrote:
>>>
>>> Thanks for the comments and advice. After running out of memory on the 
>>> Aurduino Micro, I'll switch to the mega 1284P so pins are not a problem. 
>>>
>>>
>>>
>>> On Tuesday, July 14, 2015 at 12:10:18 PM UTC-4, Mitch wrote:

 Hi All,

 I'm using 7, 2N3904 transistors with the collectors to VCC, emitters to 
 each LED anode, and bases to seven microcontroller outputs, through a 
 resistor. Is there a chip available with a similar function, to reduce the 
 parts count?

 Thanks in advance.

>>>

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[neonixie-l] Re: Seven digit Nixie project

[MichaelB]

Somebody has a Greyhound...

On Sunday, September 13, 2015 at 10:10:41 AM UTC-7, Mitch wrote:
>
> This is the final version, although I'm still finding software bugs!
>
> Tubes left to right are IN-14, IN-8-2, three Z573M, IN-12B, and National 
> NL-8522. 
>
> I plan on building eight clocks for family and friends. With top view 
> tubes, I'll use INS-1 neons.
>
> A matching acrylic cover fits on base.
>
> Thanks to everyone who helped with advice and suggestions.
>
> Mitch
>
> On Wednesday, July 15, 2015 at 8:35:06 PM UTC-4, Mitch wrote:
>>
>> Thanks for the comments and advice. After running out of memory on the 
>> Aurduino Micro, I'll switch to the mega 1284P so pins are not a problem. 
>>
>>
>>
>> On Tuesday, July 14, 2015 at 12:10:18 PM UTC-4, Mitch wrote:
>>>
>>> Hi All,
>>>
>>> I'm using 7, 2N3904 transistors with the collectors to VCC, emitters to 
>>> each LED anode, and bases to seven microcontroller outputs, through a 
>>> resistor. Is there a chip available with a similar function, to reduce the 
>>> parts count?
>>>
>>> Thanks in advance.
>>>
>>

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[neonixie-l] Re: Seven digit Nixie project

[Mitch]

Thanks for the comments and advice. After running out of memory on the 
Aurduino Micro, I'll switch to the mega 1284P so pins are not a problem. 



On Tuesday, July 14, 2015 at 12:10:18 PM UTC-4, Mitch wrote:
>
> Hi All,
>
> I'm using 7, 2N3904 transistors with the collectors to VCC, emitters to 
> each LED anode, and bases to seven microcontroller outputs, through a 
> resistor. Is there a chip available with a similar function, to reduce the 
> parts count?
>
> Thanks in advance.
>

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[neonixie-l] Re: Seven digit Nixie project

['threeneurons' via neonixie-l]

As long as you're using a microcontroller like the PIC or AVR, and not an 
8051 variant, why not use charlieplexing ?

Look at page 4 in this document:
http://nixietube.info/NixieTransistors.pdf

In your code, you twiddle both the port and its DDR bits. It can turn only 
one output ON at any time. Each output uses two I/O lines, but they are 
shared in a matrix. To turn on an output, you set the DDR bits 
corresponding to its base and emitter as outputs. You send a 1 to the base 
port bit, and a 0 to the emitter bit.

You can run LEDs directly, by hooking the anode in place of the xstr base, 
and cathodein place of the emitter. All assuming we started with NPN xstrs.

I use it on my current nixie clock kit:




On Tuesday, July 14, 2015 at 9:10:18 AM UTC-7, Mitch wrote:
>
> Hi All,
>
> I'm using 7, 2N3904 transistors with the collectors to VCC, emitters to 
> each LED anode, and bases to seven microcontroller outputs, through a 
> resistor. Is there a chip available with a similar function, to reduce the 
> parts count?
>
> Thanks in advance.
>

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