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asi120mm-s DIY cooling

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Martin_S
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asi120mm-s DIY cooling

Post by Martin_S » Sat Jun 29, 2019 6:23 am

Since I've been doing solar imaging I have noticed that my sensor temperatures in my asi 120 mm-s have risen to over 50 ° C , so I made a DIY cooler.

I'm using a 12703 TEC module @ 5v 1.25 amps 6.25 watts , running it at 12v 3.0amps was not very efficient as the 50mm square heatsink. could not disperse enough heat.

Temperature control was done with a W1209 controller.

I achieved a drop in temperature around 12 ° below ambient inside my study I'm not expecting that sort of cooling out in the sun , but I'll be happy to keep my camera within the recommended operating specifications.

In all this modification took about 3 hours and cost me around $15 AUD using parts purchased on Ebay.


Martin
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Re: asi120mm-s DIY cooling

Post by marktownley » Sat Jun 29, 2019 8:07 am

That's a nice mod Martin, thanks for sharing.
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Re: asi120mm-s DIY cooling

Post by Martin_S » Sat Jun 29, 2019 12:48 pm

Thanks Mark

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Re: asi120mm-s DIY cooling

Post by axion » Sat Jul 27, 2019 4:39 pm

that is great! I was thinking about cooling my ASI174MM from the very beginning. The first idea was to use liquid cooling from computer kits... Now I would consider Martin’s idea.

Interesting how it will work under the sun, the working temp of the camera is -5C or lower, but actually without cooling it is close to 40 or higher.

Thank you for sharing!

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Re: asi120mm-s DIY cooling

Post by marktownley » Sat Jul 27, 2019 8:57 pm

Cooling is important. I think it is for every 6-8c increase in temperature noise doubles in a camera. Normally my cameras run at around 40c - last week with our 'heatwave' they were running in excess of 60c and the noise was very apparent.

I strapped a couple of cool packs from the freezer on the camera with rubber bands, which tamed the temperature off; however this is not ideal (think condensation and camera internals).

My experience of the 174 chip is that it is the noisiest chip (camera) I have ever owned.
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Re: asi120mm-s DIY cooling

Post by Martin_S » Sun Jul 28, 2019 4:09 am

You could try a beer can cooler, first up as this will keep the direct sun off the camera body. see my last picture, I just cut one down to fit the camera body before the tilt adaptor.


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Re: asi120mm-s DIY cooling

Post by Bob Yoesle » Wed Jul 31, 2019 5:47 pm

Did this with my Chameleon a few years back:

https://www.cloudynights.com/topic/3266 ... chameleon/

I would consider active cooling for about any camera employed during the day for solar imaging.
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