Re: [neonixie-l] Presented for your consideration...The BRS Clock

> On Jun 20, 2019, at 4:42 PM, Bill Stanley wrote: > > Jeff; For my clock line time base, I decided on a brute force filter. I use a > opto-isolator powered by the rectified AC line with the assumption that any > noise would need enough energy to light an LED via a large resistor to get > th

Re: [neonixie-l] Presented for your consideration...The BRS Clock

On Thursday, June 20, 2019 at 12:57:28 PM UTC-4, Paolo Cravero wrote: > > Are you using some tricks to improve the reliability of "reading" AC line? > Either HW or SW. In Europe AC time is currently running 32 seconds late > since the beginning of the year. It will catch up, as it did in 2018 whe

Re: [neonixie-l] Presented for your consideration...The BRS Clock

> > > > Gregbert: Interested in the "genuine" qualifier and what is behind it. The > original clock board was put in a box in late 2015 with a CR2032 coin cell > powering the DS3231. When I restarted the project in early 2019, the clock > came up with under 1 minute off Great chip and really l

Re: [neonixie-l] Presented for your consideration...The BRS Clock

Hi Paolo; Programmed, past tense. I am working on putting the last 5% of features into the code now (you know, the programming part that takes 95% of the time). I am US based so not sure about the stability of other grids. My first clock (RTL based 49 years ago, details in my "about me" post). u

Re: [neonixie-l] Rare B8971 Nixie tubes

Hi Greg; Sorry for the delay, the real world called for some attention. I looked up the tube and it shouldn't present any problems, but you will need to make some choices The QTC mounts I make are base on a 12 pin connector. Your tubes would require at least a 16 pin. This is no problem as

Re: [neonixie-l] Presented for your consideration...The BRS Clock

One trick for using line frequency is to rectify, and wave shape to get a square wave.  Then set up a monostable one-shot with a period just shorter than the line frequency (or doubled full wave).  This will prevent any extraneous noise from getting through to the divider circuit that feeds the

Re: [neonixie-l] Presented for your consideration...The BRS Clock

A genuine DS3231 does a remarkable job of keeping accurate time. I have one in a wristwatch prototype board that has not been updated for more than 4 years, and it's still within 1 minute of the real time. -- You received this message because you are subscribed to the Google Groups "neonixie-l

Re: [neonixie-l] Presented for your consideration...The BRS Clock

Outstanding Bill! And it will be programmed in Assembly! Are you using some tricks to improve the reliability of "reading" AC line? Either HW or SW. In Europe AC time is currently running 32 seconds late since the beginning of the year. It will catch up, as it did in 2018 when the grid had "lost"

Re: [neonixie-l] Re: Rare B8971 Nixie tubes

Looking cool On Thu, Jun 20, 2019 at 07:18 Nicholas Stock wrote: > H > > Sent from my iPhone > > On Jun 20, 2019, at 03:18, 'Greg P' via neonixie-l < > neonixie-l@googlegroups.com> wrote: > > Hmmm > > > > > On Thursday, June 20, 2019 at 2:06:59 AM UTC-4, Robert L wrote: >> >> As Mich

Re: [neonixie-l] Re: Rare B8971 Nixie tubes

H Sent from my iPhone > On Jun 20, 2019, at 03:18, 'Greg P' via neonixie-l > wrote: > > Hmmm > > > > >> On Thursday, June 20, 2019 at 2:06:59 AM UTC-4, Robert L wrote: >> As Michael says... H >> >> >> >> >> >> >> >> >> > > -- > You received this message beca

[neonixie-l] Re: Rare B8971 Nixie tubes

Hmmm On Thursday, June 20, 2019 at 2:06:59 AM UTC-4, Robert L wrote: > > As Michael says... H > > [image: IMG_20190512_082331 (Large).jpg] > > > [image: IMG_20190512_082252 (Large).jpg] > > > > -- You received this message because you are subscribed to the Google Groups "neonix