[neonixie-l] Re: Homebrew high voltage nixie power supply

[Jon D.]

Kevin,

Please add me to the list of those interested as well.  I, too, have some 
B-7971 and ZM1350 Smartsocket projects in mind with 6-10 tubes each.

Jon J.

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Re: [neonixie-l] Re: Homebrew high voltage nixie power supply

[Kevin A.]

Hi Richard,

Thanks for the interest. Yes, there is a logic controlled enable/disable
which can switch the high voltage output on and off. In normal operation,
there is an internal pull-down on this pin in the controller IC to keep the
output on. If this pin is pulled above 1.2 volts, it will signal the
controller to turn the output off. The maximum voltage permitted on this
pin is 10 volts. I will include a terminal block for easy access to this
feature.

The difference between 170 and 180 volts should not require an additional
resistor on R31. Looking at the smartsocket cathode resistor values for
each segment, they are the same as those used in the mod-six 7971 clock,
which operates without issue with 180 volts at the anode. The ~6% increase
in power dissipated between 170v and 180v is minor and will not noticeably
affect the longevity of the tubes or driving electronics.

I've never sent a package overseas, but I could certainly try! Hopefully
customs doesn't panick at the sight of mysterious circuit boards.

Thank you,
Kevin

On Sun, Sep 8, 2019, 11:43 PM Richard Scales 
wrote:

> Please could you add me to the list of interested parties. I have some
> projects based on B-7971 and ZM1350 and would really appreciate it if i
> could use power supplies that were within spec for what I want to do.
>
> These projects include 6, 8 and 10 tube variations.
>
> Please could you confirm whether or not you include a logic driven
> enable/disable (I did see EN1 on the picture of the PCB on your project
> site). Also, am I right in thinking that to drive smart-sockets from 180V
> as opposed to 170V there needs to be a change in the value of the common
> anode resistor R31 (from a link to some resistance that deals with the
> slight increase in supply voltage)?
>
> I am in the UK - I hope that isn't a show stopper!
>
> Kind regards
>
> Richard
>
>
>
> On Sunday, 18 August 2019 06:18:20 UTC+1, Kevin A. wrote:
>>
>> Just wanted to share a nixie related project I've been working on for a
>> few weeks now. I've got the boards ordered for my latest revision. Looking
>> for any feedback and to see if this interests anyone.
>>
>>
>> https://neonkev.com/2019/08/18/project-20-watt-high-voltage-boost-converter/
>>
>> Since I got into nixies, I've found that good high voltage power supplies
>> are a major asset to any successful design. Instead of relying on Chinese
>> eBay stuff or other unsustainable sources, I wanted to build my own using
>> the latest in boost controllers and high power semiconductors in addition
>> to using the highest quality, brand name components in the actual
>> construction the supply. It's not a design built down to the lowest cost
>> but one built for silent, reliable, and continuous low-ripple operation at
>> rated power.
>>
>> This will be made open source once I've matured it to a reasonable
>> degree. I hope that the latest revision will prove satisfactory.
>>
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> .
>

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[neonixie-l] Re: Homebrew high voltage nixie power supply

[Richard Scales]

Please could you add me to the list of interested parties. I have some 
projects based on B-7971 and ZM1350 and would really appreciate it if i 
could use power supplies that were within spec for what I want to do.

These projects include 6, 8 and 10 tube variations.

Please could you confirm whether or not you include a logic driven 
enable/disable (I did see EN1 on the picture of the PCB on your project 
site). Also, am I right in thinking that to drive smart-sockets from 180V 
as opposed to 170V there needs to be a change in the value of the common 
anode resistor R31 (from a link to some resistance that deals with the 
slight increase in supply voltage)?

I am in the UK - I hope that isn't a show stopper!

Kind regards

Richard



On Sunday, 18 August 2019 06:18:20 UTC+1, Kevin A. wrote:
>
> Just wanted to share a nixie related project I've been working on for a 
> few weeks now. I've got the boards ordered for my latest revision. Looking 
> for any feedback and to see if this interests anyone. 
>
>
> https://neonkev.com/2019/08/18/project-20-watt-high-voltage-boost-converter/
>
> Since I got into nixies, I've found that good high voltage power supplies 
> are a major asset to any successful design. Instead of relying on Chinese 
> eBay stuff or other unsustainable sources, I wanted to build my own using 
> the latest in boost controllers and high power semiconductors in addition 
> to using the highest quality, brand name components in the actual 
> construction the supply. It's not a design built down to the lowest cost 
> but one built for silent, reliable, and continuous low-ripple operation at 
> rated power. 
>
> This will be made open source once I've matured it to a reasonable degree. 
> I hope that the latest revision will prove satisfactory. 
>

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