HV5122/Nixie Driver high speed alternative ?

[IamSynthetiC]

Greetings,

I am planning on building a Nixie Tube precision clock, accuratre down to the milisecond, but the speed and bandwith required to drive the nixies troubles me a bit. I was originaly planning to use 3xHV5122 32-bit shift registers to control the Nixie Tubes (each controlling 3 tubes), but their maximum clock speed is 8MHz which is not enough to update the "display" every milisecond. Are there any high speed alternatives for nixies ?

Thank you in advance.

[reboots]

IamSynthetiC, if my calculations are correct, shifting 96 bits through three HV5122s at 8MHz would allow you to update the entire display around 80 times per millisecond. What am I missing?

[IamSynthetiC]

I have been thinking this was a simple problem, and there should be a simple solution, for a while now but i couldn't find it. All this time i had confused Mhz with kHz 

followup question. Can i delete a post ? And do you know of a good hole in the earth i can hide for a while ?

[Ian.M]

You cant delete the first post in a thread with replies, and retroactively censoring yourself just makes you look even more stupid.  Do it too often and you will become notorious to the point that you get discussed in the moderation reports thread!

You are only out by three orders of magnitude and found your error before building hardware, so IMHO you should 'own' your mistake.  We've all been there and done that.   Anyone who says they haven't is either a liar or was born clutching a pocket protector!

[schmitt trigger]

That is correct. Everybody has made mistakes, at least once.
I know I have. Several times. 
Learn from the error and move on.

[Gyro]

followup question. Can i delete a post ? And do you know of a good hole in the earth i can hide for a while ?

One of the advantages (and frustrations, given its search capabilities) of this forum is that it receives so many posts that anything that stops getting replies quickly sinks into the ground. Quicker than you could dig a hole for yourself. 

If you want, you could maybe go back to your original post and edit the title to add a '(solved)' on the end, but I really wouldn't worry. There was a case the other day of  one being out by six orders of magnitude.

[Skashkash]

Dalibor has a good video on updating nixies at high speeds.



May be useful.

[wizard69]

I have to agree with others here, never be embarrassed by mistakes.

I do wonder what is the point in having a millisecond display on a clock.   Unless the clock has other functions or you have visual perception beyond the norm, will you even be able to see an update that doesn't happen every millisecond?

[IamSynthetiC]

Thank you all. I undertand that mistakes always happen in life, but I can't help but feel embarased making such silly mistakes.
Nevertheless, all mistakes hide a lesson, and i think mine is "the pen is mightier than my brain  "

I do wonder what is the point in having a millisecond display on a clock.   Unless the clock has other functions or you have visual perception beyond the norm, will you even be able to see an update that doesn't happen every millisecond?

The clock is going to have a GPS-DO with an accuracy of 10^-9 when synced to a satellite and 10^-(6~7) when it is not. So, overkill being the word of the day, i decided on milliseconds. In all seriousness though, the nixies will also display data gathered from a plethora of onboard sensors (Temprature, Humidity, Pressure, Oxygen, Carbon Dioxide & Monoxide and an odour sensor).