Author Topic: Nixie Clock Ver 2.0  (Read 3815 times)

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Offline AztlanpzTopic starter

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Nixie Clock Ver 2.0
« on: July 17, 2017, 10:49:09 am »
I have updated my design for a Nixie clock; will this work.




Thank you
 

Offline NivagSwerdna

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Re: Nixie Clock Ver 2.0
« Reply #1 on: July 17, 2017, 11:05:14 am »
Looks quite like... https://neon1.net/nixieclock/photos/main_circuit.png so I would vote for  :-+

(But I'm still a HV5812 or HV5622 fan boy myself)

 

Offline mauroh

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Re: Nixie Clock Ver 2.0
« Reply #2 on: July 17, 2017, 01:08:43 pm »
Nixie Noob here:
Is it possible to multiplex nixies using only one 74141N and multiplexing the anodes?
It seems this solution is always deprecated but I don't know why.

Thanks
Mauro

Offline mauroh

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Re: Nixie Clock Ver 2.0
« Reply #3 on: July 17, 2017, 01:19:17 pm »
Well I think someone like the multiplex solution, but I suspect it can have some cons since is not used very often

http://evertdekker.com/?p=81

Mauro
« Last Edit: July 17, 2017, 01:21:01 pm by mauroh »
 

Offline NivagSwerdna

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Re: Nixie Clock Ver 2.0
« Reply #4 on: July 17, 2017, 01:45:21 pm »
Is it possible to multiplex nixies using only one 74141N and multiplexing the anodes?
YES

You need more current but each element is on for no more than 50% of the time (actually slightly less since there should be a short OFF period as you switch digits).
There is not enough evidence to determine if this is a good idea or not... static is easier software wise.
Personally I do multiplex as I wanted to drive all digits and also the left and right decimals in six tubes... that's quite a lot of driving.

The principles are equally applicable to 74141N et al.

When I was starting out I came across this thread... http://www.avrfreaks.net/forum/tut-hard-soft-how-build-nixie-clock?page=all and the associated schematic http://www.avrfreaks.net/sites/default/files/schematic%201.pdf . It's not exactly the same as I ended up with but there is quite a lot of wisdom in there and it makes good background bedtime reading.

PS
Shameless plug for my solution.... https://www.eevblog.com/forum/projects/hv5812-driving-nixies/msg1035008/#msg1035008

PPS
Don't forget Dave's Nixie Subscriber indicator project... it offers another solution using easily obtainable parts.
« Last Edit: July 17, 2017, 01:58:40 pm by NivagSwerdna »
 

Offline mauroh

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Re: Nixie Clock Ver 2.0
« Reply #5 on: July 17, 2017, 02:01:05 pm »
Thank you so much!!
That thread is so informative and it will be nice to read it on the beach...
I like the implementation of the SMPS using the MCU, again not something really common in this nixie clocks where everyone (me too) prefer to use a third party module

Mauro

Offline NivagSwerdna

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Re: Nixie Clock Ver 2.0
« Reply #6 on: July 17, 2017, 02:10:19 pm »
I like the implementation of the SMPS using the MCU, again not something really common in this nixie clocks where everyone (me too) prefer to use a third party module
Indeed,  But in the end I went with a design very close to https://threeneurons.wordpress.com/nixie-power-supply/ for simplicity... I think Dave also used this solution... but YMMV.

FWIW I also bought eBay auction: #262524352761 whilst I was in the tinkering phase, it's really nicely made and reasonably cheap. (I have no connection to the vendor)
« Last Edit: July 17, 2017, 02:14:48 pm by NivagSwerdna »
 

Offline mauroh

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Re: Nixie Clock Ver 2.0
« Reply #7 on: July 17, 2017, 02:31:06 pm »
 :-+
I preferred the NE555 one just because I have a ton of it :) even though is not the most efficient:

http://dangerousprototypes.com/blog/2012/09/12/testing-the-efficiency-of-hv-smps-used-for-driving-nixies/

Mauro

Offline NivagSwerdna

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Re: Nixie Clock Ver 2.0
« Reply #8 on: July 17, 2017, 02:34:57 pm »
 


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