Re: [neonixie-l] First nixie clock: do I need to switch anode?

[【ツ】John Smout]

On 2 May 2019, at 18:41, Paul Andrews  wrote:
> 
> I also want to use Osmond to design some simple PCBs on the Mac - I am 
> interested in producing PCBs that are themselves a work of art (as far as I 
> can make them), and I think this would be a great project for that. 

I am a beta tester for Osmond PCB and know it quite well. So if you need help 
or a second pair of eyes, do let me know.

John S

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[neonixie-l] First nixie clock: do I need to switch anode?

[Justin Scott]

I want to build a nixie clock similar to this one:
https://www.dos4ever.com/TiT/TiT.html

I will supply HV to the anode of each tube (through a current-limiting 
resistor), and switch the cathodes using BJTs. The BJT's bases will be 
connected to a microcontroller's output through resistors.

I have read a few people online saying that in order to prevent ghosting, 
you must "blank" (turn all cathodes off) the tube when you change digits. 
This would be fine, except the same folks say you should never blank the 
tubes by turning all the cathodes off; instead, you have to turn off the 
anode. I don't really want to add a switch for the anode. Is this really 
necessary?

Also, can I just switch my digit transistors on and leave them on, or do I 
need to pulse them?

Thank you!

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