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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QKF66MMIRTXZEX66FVPNLRCGFMDHOPNP/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "QKF66MMIRTXZEX66FVPNLRCGFMDHOPNP", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/QKF66MMIRTXZEX66FVPNLRCGFMDHOPNP/?format=api", "sender": { "address": "bstrick (a) N5BRG.COM", "mailman_id": "953542c988dd4c549175bb02a8a6a1ed", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/953542c988dd4c549175bb02a8a6a1ed/emails/?format=api" }, "sender_name": "Bob Stricklin", "subject": "[pacsat-dev] Re: Blinky RTC", "date": "2024-04-17T00:35:53Z", "parent": null, "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "I would say a battery is not needed.\n\nThe clock chip is the only device on the board that has a volatile memory and the current required to keep the data in place is very low. With the capacitors on the PCB the time should be maintained over a month. This is something we can test however it would be difficult to obtain an exact time to live because when you power up to read the clock the caps will be recharged.\n\nAssuming it will be possible to set the time shortly before launch or even after launch it will be best not to have the added burden of a battery.\n\nBob\n\n> On Apr 16, 2024, at 2:18 PM, Bill Reed via pacsat-dev <[email protected]> wrote:\n> \n> Should the blinky RTC have a battery?\n> \n> \n> -----------------------------------------------------------\n> \n> pacsat-dev mailing list -- [email protected]\n> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected]\n> To unsubscribe send an email to [email protected]\n> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org\n\n", "attachments": [] }