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| Thread ID: 88095 | 2008-03-15 05:30:00 | How do Digital Camera keep their RTClock when batteries die. | John W (523) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 649590 | 2008-03-15 05:30:00 | My wife possed thes query to me and Im stumped for an answer. The Real Time Clock keeps current date even if the camera is left with dead batteries after a few weeks or month. Thanks John in Mosgiel. |
John W (523) | ||
| 649591 | 2008-03-15 06:02:00 | My camera has a second, button-cell battery for keeping the clock current. My guess is that most cameras simply make this a non user-replacable part, and require opening the camera to change it. | Erayd (23) | ||
| 649592 | 2008-03-15 06:02:00 | Often they have another separate button cell battery just for the clock. What camera? | PaulD (232) | ||
| 649593 | 2008-03-15 06:04:00 | Two possible reasons: 1) Dead batteries may not be as dead as you thought. The camera does not require substantial amount of power to maintain the inner "clock". 2) There is a backup battery. On my old film-based camera, there is a CR2032 cell located on the cover of the device which is responsible for keeping the time. Cheers :) |
Renmoo (66) | ||
| 649594 | 2008-03-15 06:22:00 | Ho John. Not a silly question from your other half. I regularly shuck the batteries from two cameras to recharge them and, I must admit, I had not given a thought to the time retention..... nice one. :) | Scouse (83) | ||
| 649595 | 2008-03-15 08:14:00 | As has been said, the clock uses almost nothing. The same is the case in a VCR clock and as I'm aware they use a slow release capacitor. When you disconnect then reconnect the power, the VCR retains the clock and programme information. Perhaps the camera also has a slow release capacitor? | Roscoe (6288) | ||
| 649596 | 2008-03-15 08:32:00 | I'm sure my Panasonic Lumix has a Supercap to keep the clock running but I have just re-read the manual and cannot find any mention of it. | decibel (11645) | ||
| 649597 | 2008-03-15 09:24:00 | The Panasonic FZ-30 manual states that so long as a fully charged battery has been in the camera for more than 24hrs the clock will keep going for 3 months. | PaulD (232) | ||
| 649598 | 2008-03-15 09:31:00 | The Panasonic FZ-30 manual states that so long as a fully charged battery has been in the camera for more than 24hrs the clock will keep going for 3 months. Sounds as though the (very) slow release capacitor requires 24 hours to charge. |
Roscoe (6288) | ||
| 649599 | 2008-03-15 11:51:00 | A watch can run for years on a button cell and yet we still have to reset the time on microwaves, ovens, alarm clocks and the like if power fails for even a second. It's good to see an example of something that actually just works for this. | TGoddard (7263) | ||
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