{"id":17836858,"url":"https://github.com/mdaskalov/dcf77-clock-sync","last_synced_at":"2025-03-19T21:30:30.098Z","repository":{"id":225532234,"uuid":"766225422","full_name":"mdaskalov/dcf77-clock-sync","owner":"mdaskalov","description":"Emulate DCF77 time signal on Flipper Zero using the RFID antenna and the A4 GPIO pin","archived":false,"fork":false,"pushed_at":"2024-03-16T13:38:12.000Z","size":27,"stargazers_count":21,"open_issues_count":1,"forks_count":3,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-02-28T23:12:20.399Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/mdaskalov.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2024-03-02T17:16:58.000Z","updated_at":"2025-02-11T10:03:01.000Z","dependencies_parsed_at":"2024-03-16T14:02:39.371Z","dependency_job_id":"141a5163-4a1b-460c-bb6d-2bac7738b20c","html_url":"https://github.com/mdaskalov/dcf77-clock-sync","commit_stats":null,"previous_names":["mdaskalov/dcf77-clock-sync"],"tags_count":3,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fdcf77-clock-sync","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fdcf77-clock-sync/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fdcf77-clock-sync/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdaskalov%2Fdcf77-clock-sync/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/mdaskalov","download_url":"https://codeload.github.com/mdaskalov/dcf77-clock-sync/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":244056329,"owners_count":20390719,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-27T20:44:05.346Z","updated_at":"2025-03-19T21:30:29.780Z","avatar_url":"https://github.com/mdaskalov.png","language":"C","funding_links":[],"categories":["Tools"],"sub_categories":[],"readme":"# Flipper-Zero DCF77 Clock Sync\nEmulates the [DCF77](https://en.wikipedia.org/wiki/DCF77) time signal on the RFID antenna and on GPIO A4 pin.\n\nUses PWM with frequency of 77.5 kHz on the GPIO pin to simulate the signal.\n\n# Usage\n\nNormally the clock gets syncrhonized in two to five minutes depending on the signal strength.\n\nThe OK button changes the transmitted signal between CET and CEST (dst) time.\n\n# Antenna\nThe RFID antenna wokrs best at distances of up to 50cm. The signal gets recognized in few seconds.\n\nWhen using the GPIO, best results are achieved if you connect a ferrite antenna over 330 ohm resistor and a capactior to ground.\n\nIt also works with analog beeper or small in-ear headphone connected to the GPIO pin.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmdaskalov%2Fdcf77-clock-sync","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmdaskalov%2Fdcf77-clock-sync","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmdaskalov%2Fdcf77-clock-sync/lists"}