{"action":"created","issue":{"url":"https://api.github.com/repos/udoklein/dcf77/issues/17","repository_url":"https://api.github.com/repos/udoklein/dcf77","labels_url":"https://api.github.com/repos/udoklein/dcf77/issues/17/labels{/name}","comments_url":"https://api.github.com/repos/udoklein/dcf77/issues/17/comments","events_url":"https://api.github.com/repos/udoklein/dcf77/issues/17/events","html_url":"https://github.com/udoklein/dcf77/issues/17","id":178668110,"number":17,"title":"NANO with DCF77-receiver and too much drift (DCF77_Scope)...?","user":{"login":"Jo-Achim","id":21124877,"avatar_url":"https://avatars.githubusercontent.com/u/21124877?v=3","gravatar_id":"","url":"https://api.github.com/users/Jo-Achim","html_url":"https://github.com/Jo-Achim","followers_url":"https://api.github.com/users/Jo-Achim/followers","following_url":"https://api.github.com/users/Jo-Achim/following{/other_user}","gists_url":"https://api.github.com/users/Jo-Achim/gists{/gist_id}","starred_url":"https://api.github.com/users/Jo-Achim/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Jo-Achim/subscriptions","organizations_url":"https://api.github.com/users/Jo-Achim/orgs","repos_url":"https://api.github.com/users/Jo-Achim/repos","events_url":"https://api.github.com/users/Jo-Achim/events{/privacy}","received_events_url":"https://api.github.com/users/Jo-Achim/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2016-09-22T17:11:00Z","updated_at":"2016-09-24T08:46:50Z","closed_at":"2016-09-23T09:14:21Z","body":"Hi,\r\nI have a little problem with the Libraries v.3.0.0 and before on my Arduino Nanos (IDE 1.6.11). ;-)\r\n\r\nE.g. \"Simple_Clock\" will not synchronize; so I see \"Initializing...\" and a lot of '.' only. \r\n\r\nBecause my Nanos with Conrad-DCF77-receiver are working (https://arduino-hannover.de/2012/06/14/dcf77-empfanger-mit-arduino-betreiben/) with synchronization normally within 2 - 3 minutes), ...\r\n\r\nLooking at the output from \"DCF77_Scope\", I think, I found the reason: the output drifts to the right side within 1.000 seconds round about 340 ms.\r\n\r\n        1, +---------+---------+---------+---------+---------+---------+---------+---------+---------+---------\r\n        2, +---------+---------+---------+---------+----9XXXXXXXXXXX---+---------+---------+---------+---------\r\n        3, +---------+---------+---------+---------+----9XXXXXXXXXXXXXXXXXXXXX9--+---------+---------+---------\r\n        4, +---------+---------+---------+---------+----7XXXXXXXXXXXXXXXXXXXXX3--+---------+---------+---------\r\n        5, +---------+---------+---------+---------+----9XXXXXXXXXXXX--+---------+---------+---------+---------\r\n\r\n      995, +---------+---------+---------+---------+---------+---------+---------+--------7XXXXXXXXXXXXXXXXXXXX\r\n      996, XX--------+---------+---------+---------+---------+---------+---------+--------3XXXXXXXXXXXX5-------\r\n      997, +---------+---------+---------+---------+---------+---------+---------+--------2XXXXXXXXXXXX6-------\r\n      998, +---------+---------+---------+---------+---------+---------+---------+--------3XXXXXXXXXXXXXXXXXXXX\r\n      999, X8--------+---------+---------+---------+---------+---------+---------+--------2XXXXXXXXXXXXXXXXXXXX\r\n     1000, XX3-------+---------+---------+---------+---------+---------+---------+--------2XXXXXXXXXXX8-------- \r\n\r\n\r\n\r\nThis result I get with my best Nano (with the lowest drift)! (I have 3 Nanos from 2 different manufacturers tested.) \r\n\r\nIs my suggestion correct that the 'no-synchronize'-problem is based on this drift? \r\n\r\nCan you say, how high is, based on your filter-algorithm, the maximum drift per unit of time / or the max. tolerable divergences of the 16-MHz oscillator in Hz or in ppm? \r\nAre they any variables available to solve the problem in software?\r\n\r\nThank you for help.\r\n\r\nBest regards, Joachim.\r\n"},"comment":{"url":"https://api.github.com/repos/udoklein/dcf77/issues/comments/249353611","html_url":"https://github.com/udoklein/dcf77/issues/17#issuecomment-249353611","issue_url":"https://api.github.com/repos/udoklein/dcf77/issues/17","id":249353611,"user":{"login":"udoklein","id":5356932,"avatar_url":"https://avatars.githubusercontent.com/u/5356932?v=3","gravatar_id":"","url":"https://api.github.com/users/udoklein","html_url":"https://github.com/udoklein","followers_url":"https://api.github.com/users/udoklein/followers","following_url":"https://api.github.com/users/udoklein/following{/other_user}","gists_url":"https://api.github.com/users/udoklein/gists{/gist_id}","starred_url":"https://api.github.com/users/udoklein/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/udoklein/subscriptions","organizations_url":"https://api.github.com/users/udoklein/orgs","repos_url":"https://api.github.com/users/udoklein/repos","events_url":"https://api.github.com/users/udoklein/events{/privacy}","received_events_url":"https://api.github.com/users/udoklein/received_events","type":"User","site_admin":false},"created_at":"2016-09-24T08:46:49Z","updated_at":"2016-09-24T08:46:49Z","body":"On 23.09.2016 11:14, Jo-Achim wrote:\n>\n> Hello Udo,\n>\n> thank you for information's.\n>\n> First I will see to get an original (Gravitech) Nano - hopeful with \n> crystal oscillator and proper load capacitors - for reference.\n>\n> Best regards, Joachim.\n>\n> PS: Great work!\n>\n> —\n> You are receiving this because you commented.\n> Reply to this email directly, view it on GitHub \n> <https://github.com/udoklein/dcf77/issues/17#issuecomment-249142713>, \n> or mute the thread \n> <https://github.com/notifications/unsubscribe-auth/AFG9hNkGybDHbYa8N1ik2OxsebLB5eyAks5qs5hugaJpZM4KEI_k>.\n>\nAccording to the Eagle files the Gravitech has a resonator. You may be \nluckier at *bay:\n\n\nhttp://www.ebay.de/itm/New-design-Pro-Mini-atmega328-5V-16M-Replace-ATmega128-Arduino-Compatible-Nano-/172271346955?hash=item281c2c250b:g:0S8AAOSwo6lWL0gM\n\nhas a crystal and is very cheap. If you like my project you can donate \nhere: https://blog.blinkenlight.net/good-karma/\n\n\nBest regards, Udo\n\n"}}
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