Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

On 4 November 2016 at 16:03, David Forbes wrote: > Martin, > > Yes, I have read that app note. I know all about good layout practice. It > does not address my problem that the capacitors are built in. I even sent a > query to the Maxim app engineers. They had no solutions,

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

Martin, Yes, I have read that app note. I know all about good layout practice. It does not address my problem that the capacitors are built in. I even sent a query to the Maxim app engineers. They had no solutions, other than spending lots more money for their high-end product. On 11/3/2016

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

Have you read Application note 58. "Crystal Considerations with Maxim Real-Time Clocks (RTCs)" for the RTCs? I don't know if it will help you but it mentions a lot of things to think about when using these RTCs with built in load capacitors, it mentions layout designs and other things related

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

Greg, This is for a product, so I am not interested in one-off or selected-component solutions. I have a rubidium Nixie clock at home that I use to set and check my Nixie watches. I find that the typical 20PPM watch crystal can be adjusted to keep time to 1PPM if it's kept at room

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

They have to be fakes - that's $0.42 including free international shipping, so the board and components are costing pennies! Maxim budgetary pricing for the chip alone is $3.85 @ 1K scale. Another evidence point for the old maxim that if it seems too good to be true... it probably is. But the

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

Keep the DS3231; it's very accurate. One of my clocks uses it, and it has drifted about 10 seconds since daylight savings started more than 6 months ago. My wristwatch demo board has been running 1.5 years and it's also within a few seconds. If you want anything better, you'll probably need

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

Agreed, most likely fakes. I like these RTCs and use them in my projects. A buddy of mine bought some cheap ones and they were inaccurate. I think they were indeed fakes. On 11/2/2016 6:26 AM, 'Terry S' via neonixie-l wrote: I can only guess that the parts are counterfeit, for some reason RTCs

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

I can only guess that the parts are counterfeit, for some reason RTCs are among the favorite parts for the Chinese to fake. On Wednesday, November 2, 2016 at 2:48:48 AM UTC-5, Nixcited delighted wrote: > > On 2 Nov 2016, at 06:29, Nick wrote: > > > The DS323x series are simple great chips -

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

Hello. (In the cheap Chinese modules) DS1307 are not accurate. In a DIY clock for my own personal use (bedside clock ;) ) I estimated the drift and corrected it in software, daily. That can be done since it runs 24/7. I had also found an algorithm that computes the total drift from the set

Re: [neonixie-l] Re: RTC chips that behave nicely with crystals

On 2 Nov 2016, at 06:29, Nick wrote: > The DS323x series are simple great chips - they may be a few $ more, but it's > not all about cost - lower component count, greater accuracy (actually, > phenomenal accuracy). > > What's not to like? > > Nick A few more $$$s? You can buy a - DS3231

[neonixie-l] Re: RTC chips that behave nicely with crystals

The DS323x series are simple great chips - they may be a few $ more, but it's not all about cost - lower component count, greater accuracy (actually, phenomenal accuracy). What's not to like? Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l"