Mahdi,

Gotcha.  Your design makes me happy then.  

Nice work!

On Wednesday, December 4, 2019 at 5:45:16 PM UTC-5, Mahdi Al Husseini wrote:
>
> Greg,
>
> You can check out the schematic on the associated GitHub Repo for details, 
> but I am not using muxs or shift registers for the ZM1350 board. ESP32 --> 
> PIC --> discrete transistor --> cathode pin.
>
> That said, some of my previous designs have made extensive use of 7HC595s 
> and 74141s
>
> Mahdi
>
> On Wed, Dec 4, 2019 at 5:02 PM 'Greg P' via neonixie-l <
> [email protected] <javascript:>> wrote:
>
>> Mahdi,
>>
>> Not multiplexed.  
>>
>> Direct drive digits or segments are always on and not pulsed at high 
>> speeds like in multiplexing.  Direct driven tubes typically are brighter 
>> and require less current.  Multiplexed designs are simpler and require less 
>> components which is cheaper. 
>>
>> I'm sure the folks here who are way smarter than me can give a better 
>> explanation, but hopefully you get the gist.
>>
>>  
>>
>>
>>
>> On Wednesday, December 4, 2019 at 4:10:20 PM UTC-5, Mahdi Al Husseini 
>> wrote:
>>>
>>> Hi Greg, sorry I missed your message. Can you explain what you mean by 
>>> direct drive?
>>>
>>> On Wed, Dec 4, 2019 at 2:57 PM Mahdi Al Husseini <[email protected]> 
>>> wrote:
>>>
>>>> Hi Paul,
>>>>
>>>> I’ll add an option where the acrylic covers the sockets for tubes 7 and 
>>>> 8. Same PCB so you can always switch acrylic plates and display all eight 
>>>> tubes, if you come across two more. Just let me know if that’s something 
>>>> you’d like to do. 
>>>>
>>>> Mahdi
>>>>
>>>> On Wed, Dec 4, 2019 at 1:18 PM Paul <[email protected]> wrote:
>>>>
>>>>> I am interested in the ZM1350 version. I only have 6 tubes.
>>>>> I might be interested in a B-5971 version depending on cost.
>>>>> Thanks Paul
>>>>>
>>>>> On Friday, November 29, 2019 at 11:16:34 AM UTC-7, Mahdi Al Husseini 
>>>>> wrote:
>>>>>>
>>>>>> Hi, everyone,
>>>>>>
>>>>>> I'm working on an eight digit ZM1350 display with a multilayered 
>>>>>> black anodized aluminum and black acrylic exterior. I know eight ZM1350s 
>>>>>> are hard to come by, but would anyone be interested in purchasing one, 
>>>>>> fully assembled without tubes, to include the casing, for around 
>>>>>> $300.00? 
>>>>>> Just gauging interest. Technically you can use however many ZM1350s as 
>>>>>> you 
>>>>>> have available; eight for the full display. 
>>>>>>
>>>>>> Here's a GitHub repo with some pictures to check out more. 
>>>>>>
>>>>>> Thanks. I'm making it either way, but just looking to offset some 
>>>>>> production cost since min order is five. 
>>>>>>
>>>>>> https://github.com/csapidus/zm1350-display
>>>>>>
>>>>>> Al
>>>>>>
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