Hello Again group!
I've been testing this for a while, and I still have some delay minutes. This is the PCB design I'm using and components. *Components: * ·PIC16F1936 ·CRYSTAL MS3V-T1R CRYSTAL 32.768 Khz. ·Capacitors ( used 6.0 ; 7.0 ; 9.0 & 12.5) pF as datasheet from crystal recommend. ·Resistor value between 50/65 K ohm. *PCB Design: * This design is done following the document you guys added called: Microship TB097 which give's good instructions on how install Crystals to our pics. Guys, My head is gonna explote because I don't find the problem that is making minutes delays in 24H (About 3 mins per 24H). I'm questioning two fact's that can be making this delay: *1.* Pins connections between Crystal + Pic. In some other designs, crystal is attached to other pins. For example. Example A) Crystal pins connected to *PIN 9: A7/CLKIN* & *PIN 10: A6/CLKOUT.* Example B) Crystal pins connected to *PIN 11: RC0/T1OSO *& *PIN 12: RC1/T1OSI. * this make's me think that I'm connectin the crystal to wrong pins? what's the difference between them? *2*. Maybe I need to try better with other cap values? *3.* Software getting the count wrong? Thanks a lot guys, I really appreciate your time and help. Christopher.. El jueves, 20 de mayo de 2021 a las 21:09:01 UTC+2, Dekatron42 escribió: > Since this is a Tuning Fork type of crystal they are sensitive to to much > energy and might become damaged if you use them incorrectly. You should > read this article: > http://ww1.microchip.com/downloads/en/appnotes/91097a.pdf and also read > the Microchip application note above that Bill van Dijk suggested as they > both explain/discuss how to use this type of crystal. > > In this document for the PIC-processor in question: > http://ww1.microchip.com/downloads/en/devicedoc/41364e.pdf they also > mention the 91097a.pdf above as a document to read on page 71. > > /Martin > > On Thursday, 20 May 2021 at 20:40:49 UTC+2 MrThe50sanchez wrote: > >> Ei Martin! >> >> I'm using PIC16F1936 (16F family!) >> >> my connections are the following. >> >> Crystal pin 1 - RA7/OSC1/CLKIN/SEG2 >> Crystal pin 2 - RA6/OSC2/CLKOUT/VCAP/SEG1 >> >> >> I add you my pcb design (The old one) and the new one! >> >> (OLD ONE) >> [image: old ddesign.png] >> >> >> >> NEW DESIGN >> [image: new design.png] >> >> >> Thanks a lot! >> >> El jue, 20 may 2021 a las 16:28, Dekatron42 (<[email protected]>) >> escribió: >> >>> What PIC-controller is the crystal hooked up to? Did you follow the >>> design specifications for using the crystal you chose? >>> >>> /Martin >>> >>> On Thursday, 20 May 2021 at 16:03:55 UTC+2 [email protected] wrote: >>> >>>> All the cheap watches and clock movements seem to use the same small >>>> cylindrical crystal. I got many of mine by taking them out of old watches >>>> or clocks that had stopped working properly (like worn out gears in a >>>> clock). If you do not already have any in your junk box, you should be >>>> able to buy a working one from a street vendor or flea market for under >>>> € 5, and probably less than € 1. Also, new crystals will cost less >>>> than US$1 each (plus shipping and handling), so you could buy several and >>>> select the one that works the best. >>>> >>>> On Wednesday, May 19, 2021 at 11:55:42 PM UTC-7 MrThe50sanchez wrote: >>>> >>>>> ? Any recommendations of where can I get a good quality cristal for my >>>>> watch? >>>>> >>>> -- >>> >> 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 [email protected]. >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/b9d34649-4fef-4fe8-a44b-8544b51dee8cn%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/b9d34649-4fef-4fe8-a44b-8544b51dee8cn%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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/ed30ac37-9ac8-43bb-9d06-0d7837281ec1n%40googlegroups.com.
