Thank's a lot Bill,
I'm gonna take a really good look at all the info you provide and will make a really good accurate watch. El mar, 20 abr 2021 a las 19:42, Bill van Dijk (<theoldpha...@gmail.com>) escribió: > Without knowing your exact design I cannot recommend a specific xtal. For > instance, PIC processors recommend a xtal with a load capacity of about > 12pF, while other designs are optimized for different xtals. Often the > devise data sheet will give you a short list of recommended xtals which > have been tested by the chip designer. The main thing is that for critical > applications (such as a time keeping devise) always get a good brand name > item with full specifications. Often xtals used for running a program are > not critical, so there you can sometimes get away with something cheap; as > long as it runs, and is close. I am a great proponent of recycling, but > saving 32kHz clock xtals is not worth the trouble. Xtals are complicated; > there are different cuts and styles, all specific to particular > applications. > > > > There is a great app note from Microchip worth reading: > > http://ww1.microchip.com/downloads/en/appnotes/00949a.pdf > > > > Even Wikipedia has a decent chapter on xtals: > > https://en.wikipedia.org/wiki/Crystal_oscillator > > > > Lots of other good information sources on the interweb. > > > > Cheers, Bill > > > > *From:* neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] *On > Behalf Of *MrThe50sanchez > *Sent:* Tuesday, April 20, 2021 12:22 PM > *To:* neonixie-l <neonixie-l@googlegroups.com> > *Subject:* Re: [neonixie-l] CRISTAL + CAPACITOR = TIME DELAY HELP > > > > Hello Bill, > > > > Thanks a lot for your answer and your knoledge, > > > > I will do a chart with different capacitors values and I will see how the > time delay get's. I'm using two capacitor to ich leg of the cristal. > > > > as you say, my cristal is not that good, do you recommend a cristal in > specific? > > > > thanks a lot! > > > > El lunes, 19 de abril de 2021 a las 14:34:49 UTC+2, Bill van Dijk escribió: > > If you are still slow with the 10pF, a 12pF is not going to do it. The > relationship between the crystal and load capacitor is critical, and it is > therefore a mystery to me that so many (of the cheaper) are sold without > the specifications. Anyway, if yours is a cheap Chinese crystal, try some > other ones, perhaps you just got a bad one. Generally I always like to get > a good brand name crystal. If you want to play with the one you have, try > something lower yet, 8 or 7pF. > > > > In general terms, and within limits, larger cap slows it down, smaller cap > speeds it up. Sometimes (if you use 2 caps) using a slightly different cap > on one leg of the crystal can make a difference in the final frequency. > > > > Bill > > > > *From:* neoni...@googlegroups.com [mailto:neoni...@googlegroups.com > <neoni...@googlegroups.com>] *On Behalf Of *MrThe50sanchez > *Sent:* Monday, April 19, 2021 4:23 AM > *To:* neonixie-l <neoni...@googlegroups.com> > *Subject:* [neonixie-l] CRISTAL + CAPACITOR = TIME DELAY HELP > > > > Hello Guys! > > > > I have a nice question to ask you guys if you can give me some help. > > > > I builded a Nixie watch, It works good, but I'm having a little bit of > time delay, 1* min within 6 hours. * > > > > At the *first time,* I had 6 min delay for 6 hours aproximately. I > investigated the relation of the cristal and the capacitors you need to > install with it. First, I had 22pF for a cristal that requires 12.5pF, > giving me that 6 min delay for 6 hours, then, I realised these and > installed 10Pf capacitor and the delay decreased to 1 minute for 6 hours, > and I just ordered new capacitors of 12pF to get more closer to the > manufacture requires, So I imagine that the delay is gonna get less. > > > > ·Is there any way to make this time delay shorter? > > ·Do you recommend me a tipe of cristal that is really acurate to install > on my watch? > > > > Thanks a lot nixie lover's > > > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/7ce2b557-f652-44b2-a71f-ed75b96ea06fn%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/7ce2b557-f652-44b2-a71f-ed75b96ea06fn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/5e51943e-d45c-4421-b00c-06fb2dc8380fn%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/5e51943e-d45c-4421-b00c-06fb2dc8380fn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to a topic in the > Google Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/TiYbTyH9ISc/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/013901d7360c%2491079660%24b316c320%24%40gmail.com > <https://groups.google.com/d/msgid/neonixie-l/013901d7360c%2491079660%24b316c320%24%40gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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