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script request: unlimited timelapse with overheat protection

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Offline barret

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script request: unlimited timelapse with overheat protection
« on: 09 / January / 2009, 10:06:27 »
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hello, i've been thinking about some script that would take pictures at a fixed rate (few sec), but with monitoring temperature.
i'm a bit concerned about connecting my camera to power supply, and leaving it unattended for about 24h. if something goes wrong, power supply might break, causing camera to overheat or something. 

so, the idea is quite simple: standard unlimited timelapse recording with added temperature protection: when temperature rises above some defined level, camera switches off. simple, isn't it? :)

we could take battery compartment temperature into account, or ccd temperature, or both...

what do you think?

hmmm, maybe i could write such script by myself? but how to get temperature into a variable...
« Last Edit: 09 / January / 2009, 10:08:25 by barret »

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Offline msl

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Re: script request: unlimited timelapse with overheat protection
« Reply #1 on: 09 / January / 2009, 10:15:55 »
Hello and wellcome,

You can use get_temperature.

CHDK-DE:  CHDK-DE links

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Offline PhyrePhoX

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Re: script request: unlimited timelapse with overheat protection
« Reply #2 on: 09 / January / 2009, 10:18:22 »
i think the camera will shutdown when a certain temperature is being read from the sensors - i guess thats why the sensors are built in there in the first place.

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Offline fbonomi

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Re: script request: unlimited timelapse with overheat protection
« Reply #3 on: 09 / January / 2009, 12:18:08 »
I know that does not prove anything, but I have had my camera running for almost 48 hours in the hot italian august on a home-made power supply .... and it's still alive!




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Offline barret

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Re: script request: unlimited timelapse with overheat protection
« Reply #4 on: 09 / January / 2009, 14:26:11 »
thank you very much for replies.
yes, i know camera will probably shut down automatically, when certain level of heat is reached.
what concernes me more, is some more extreme situations, like failure of power supply.
i know such situations doesn't happen very often, but anyway i want to protect myself.

one other thing comes to my mind: how obout logging temperature to some text file while taking photos? for example every 10th shot? would that be possible? i know that's not extremely needed function, but it would be fun to see, that your camera was taking photos at, say, -20 centigrade :D

greets

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Offline fbonomi

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Re: script request: unlimited timelapse with overheat protection
« Reply #5 on: 09 / January / 2009, 15:12:40 »

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Offline whim

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Offline fe50

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Re: script request: unlimited timelapse with overheat protection
« Reply #7 on: 09 / January / 2009, 15:32:26 »


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Offline whim

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Re: script request: unlimited timelapse with overheat protection
« Reply #8 on: 09 / January / 2009, 15:38:48 »
@fe50

i meant -20 sensor temperature - and i know it gets cold in Germany, i've been there in winter ...
it 'only' got to -20 in the east of Holland, i'm 6 km from the North Sea here, so i haven't experienced
anything below -7 recently.

cheers,

wim

edit: must learn to read ...
« Last Edit: 09 / January / 2009, 15:43:46 by whim »

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Offline barret

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Re: script request: unlimited timelapse with overheat protection
« Reply #9 on: 09 / January / 2009, 15:41:10 »
yeah, we had such extreme temperatures here in Poland as weel :) i'm not saying i want to freeze my CCD, i was just curious how camera reacts in such conditions. i have already used it in temperatures below zero, and it worked without any problems.
logging temperature would be fun :)

_update_
ok, so i've modified ultra intervalometer script, so it's displaying temperature on every loop, but how can i save this value to a file? with a timestamp if possible :)
« Last Edit: 09 / January / 2009, 16:13:13 by barret »

 

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