peltier cooling

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jpinna
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peltier cooling

Post by jpinna » Fri Feb 15, 2013 12:16 am

Just wondering what you think about me doing a Peltier mod on my cctv cam, is it worth doing as we dont seem to get much hot weather, would a heatsink and fan do the job, I know it wont bring the temp down as good as peltier cooling.

I checked the temp on the casing the other night indoors, and it peaked at 27.8c so I imagine it will be well into the 30's inside the casing but outside i would think it would be much cooler. [will have to check it next time it's outside]

There is room behind the ccd to fit a Peltier and heatsink and maybe just sqeeze in a small fan all behind it.

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rwilkinson
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Re: peltier cooling

Post by rwilkinson » Fri Feb 15, 2013 8:14 am

I've fitted a small 5V fan on many of the LX-webcams I've converted, and it does help - I can feel the warm air being blown out of the case.

A Peltier module is definitely the business for low-temp operation - my old MX5C included one (as do most commercial astro CCDs). But the downside (particularly in our damp climate) is condensation (or even frosting-up) ask Gerald about his experiences - he tried a couple of cooled CCDs before returning to his "normally aspirated" Canon DSLR.
But if you could connect a heat-pipe from the back of the CCD chip to the Peltier module, rather than cooling the case from the outside, it may be worth a go. I've got an old Peltier module from a 12V fridge in the shed if you'd like to try it?

jpinna
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Posts: 99
Joined: Thu Jun 14, 2012 5:46 pm
Location: Little Lever

Re: peltier cooling

Post by jpinna » Fri Feb 15, 2013 10:26 pm

I've looked into it a bit more, and it looks like a job and half to do.Someone in the states managed to do it, but had to remove one of the internal pcb boards to the outside of the cam and put it in a plastic enclosure box and secure it to the underside of the cam.

So being a bit of a coward i'm going to take the easy option and fit just a fan on the top cover 40 x 40 x10 is the biggest size that will fit.

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