Attiny85 controlled watch winder for self-winding mechanical watches
Abstract In mechanical self-winding movement, the center-anchored Rotating Weight rotates about its axis with physical motions of the hand. It thereby winds the mainspring only when worn and stops during lay-offs. A watch winder re-creates the physical motions to maintain the beat in the caliber, wh...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-07-01
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| Series: | Journal of Electrical Systems and Information Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s43067-022-00056-z |
| _version_ | 1811287244588187648 |
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| author | Madhavan Thothadri |
| author_facet | Madhavan Thothadri |
| author_sort | Madhavan Thothadri |
| collection | DOAJ |
| description | Abstract In mechanical self-winding movement, the center-anchored Rotating Weight rotates about its axis with physical motions of the hand. It thereby winds the mainspring only when worn and stops during lay-offs. A watch winder re-creates the physical motions to maintain the beat in the caliber, when not worn. The paper proposes a residential tourbillon watch winder for self-winding mechanical calibers. The main objectives of this paper are to minimize the working time of the winder and consequently optimize its power consumption. A significant trade-off between the winding and unwinding ratios of the mainspring is ensured, maintaining a higher former ratio using a single-phase 9 RPM Permanent Magnet Synchronous Motor. The proposed model states the sufficiency of the winder to work only for 60% of the time. The model uses Watchdog timer to rekindle Attiny85 Microcontroller from sleep mode for scheduling the working time of the winder. The disclosed model is deployed to a Seiko (7S26A) caliber and a Citizen (8200A) Caliber for a period of 26 days to validate the working. The results show that the proposed model with the Seiko caliber requires 41.1 h for winding while the commercial models require 70.99 h. Similarly with the Citizen Caliber, the proposed watch winder requires only 28.8 h which is 21.11 h less than the time required by commercial models. |
| first_indexed | 2024-04-13T03:15:16Z |
| format | Article |
| id | doaj.art-70d2081a145c48b7b8a5e68994ad730c |
| institution | Directory Open Access Journal |
| issn | 2314-7172 |
| language | English |
| last_indexed | 2024-04-13T03:15:16Z |
| publishDate | 2022-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Electrical Systems and Information Technology |
| spelling | doaj.art-70d2081a145c48b7b8a5e68994ad730c2022-12-22T03:04:56ZengSpringerOpenJournal of Electrical Systems and Information Technology2314-71722022-07-019111310.1186/s43067-022-00056-zAttiny85 controlled watch winder for self-winding mechanical watchesMadhavan Thothadri0Department of Electrical and Electronics Engineering, Rajalakshmi Engineering CollegeAbstract In mechanical self-winding movement, the center-anchored Rotating Weight rotates about its axis with physical motions of the hand. It thereby winds the mainspring only when worn and stops during lay-offs. A watch winder re-creates the physical motions to maintain the beat in the caliber, when not worn. The paper proposes a residential tourbillon watch winder for self-winding mechanical calibers. The main objectives of this paper are to minimize the working time of the winder and consequently optimize its power consumption. A significant trade-off between the winding and unwinding ratios of the mainspring is ensured, maintaining a higher former ratio using a single-phase 9 RPM Permanent Magnet Synchronous Motor. The proposed model states the sufficiency of the winder to work only for 60% of the time. The model uses Watchdog timer to rekindle Attiny85 Microcontroller from sleep mode for scheduling the working time of the winder. The disclosed model is deployed to a Seiko (7S26A) caliber and a Citizen (8200A) Caliber for a period of 26 days to validate the working. The results show that the proposed model with the Seiko caliber requires 41.1 h for winding while the commercial models require 70.99 h. Similarly with the Citizen Caliber, the proposed watch winder requires only 28.8 h which is 21.11 h less than the time required by commercial models.https://doi.org/10.1186/s43067-022-00056-zAttiny85Watchdog timerSynchronous motorWatch winderSelf-winding calibersGear ratio |
| spellingShingle | Madhavan Thothadri Attiny85 controlled watch winder for self-winding mechanical watches Journal of Electrical Systems and Information Technology Attiny85 Watchdog timer Synchronous motor Watch winder Self-winding calibers Gear ratio |
| title | Attiny85 controlled watch winder for self-winding mechanical watches |
| title_full | Attiny85 controlled watch winder for self-winding mechanical watches |
| title_fullStr | Attiny85 controlled watch winder for self-winding mechanical watches |
| title_full_unstemmed | Attiny85 controlled watch winder for self-winding mechanical watches |
| title_short | Attiny85 controlled watch winder for self-winding mechanical watches |
| title_sort | attiny85 controlled watch winder for self winding mechanical watches |
| topic | Attiny85 Watchdog timer Synchronous motor Watch winder Self-winding calibers Gear ratio |
| url | https://doi.org/10.1186/s43067-022-00056-z |
| work_keys_str_mv | AT madhavanthothadri attiny85controlledwatchwinderforselfwindingmechanicalwatches |