Jump to content

Recommended Posts

Lower TA0CCR0 value (32767 default,) 32761 or 32762 should work for you.

You could also change XCAP, but adjusting CCR0 should work for you (since the clock is slow.)

In all likelihood, it's the crystal running slower due to changes in temperature- when I assembled it, it was around 55F low / 80F high here, and now it's going from 40F to 70F.


That might be something to look into, i.e. using the 430's temp sensor to introduce a temp-related offset to CCR0.

Link to post
Share on other sites
  • Replies 83
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

MSP430 based Nixie tube clock.     I was looking for some nice Nixie tube digit images so I could add them to my EduKit library, but I couldn't find any usable ones. I decided to just buy few of

This is how the display case option will look like. Standoffs will be white nylon, not brass. Screws will be silver. Faceplate can be used in 2 different ways, horizontal and vertical.  

Little demo  

Posted Images

  • 2 weeks later...
  • 4 weeks later...

I bought one of @@RobG's clock kits and I am very happy with the results.

I have kids and didn't want to have any wandering fingers getting zapped, so I designed and printed an enclosure for it.

Here are some photos of it. I couldn't resist adding the colon.


I uploaded the .stl files if anyone wants to print it.


Thanks to Rob for the awesome kit!






Link to post
Share on other sites
  • 1 month later...
  • 1 month later...

I want to do another version of the board, one that uses IN-8 tubes, but the question is, should the tubes face in or out.

As a geek, my choice is in, so that I can see all components in front of the tubes.

Tubes facing out would be better if you want to use enclosure.


SMD version of the IN-8 based clock is also an option (1" shorter PCB.)



Link to post
Share on other sites



I just got around to assembling my Nixie clock this afternoon.


There's one digit out. 


I know it's not the Nixie tube because I swapped them around and they all work.


Got any troubleshooting tips?



Link to post
Share on other sites

@@zeke - that is surprising. Mine worked out of the box.

Probably a case of an individual board flaw.


Its a flaw of the cheap board houses. I've had about 2 boards out of 20 batches or so (~1%) that I can see they've done a ERC check by scratches on the pads, but there has been no visible mark, (sharpie)  telling me it was defective. I actually have had boards that were sharpied, but after close inspection they work fine. I suppose more reputable PCB fabs have better testing equipment.

Link to post
Share on other sites

Yup. The thin vertical line is an absence of copper.


I used red because I was just doing a quick fix.  


The plan is to scrap off the solder mask and solder down a bridge across the gap and then cover it with something.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...