Print Page - Scary things with a 450D

Title: Scary things with a 450D
Post by: mickw on Oct 19, 2009, 15:09:29

Mark, does this give you any ideas :D

http://thaiastro.nectec.or.th/hypermod/ (http://thaiastro.nectec.or.th/hypermod/)

Title: Re: Scary things with a 450D
Post by: Mac on Oct 19, 2009, 15:24:58

wow, thats a fantastic mod.

Mac.

Title: Re: Scary things with a 450D
Post by: Mike on Oct 19, 2009, 15:29:47

Wow! Indeed it is. Quite impressive. A good way to get a cheap cooled one-shot colour cam too.

Title: Re: Scary things with a 450D
Post by: mickw on Oct 19, 2009, 15:31:50

If you ask him nicely, I'm sure Mark would like to practice on a D3 before damaging a perfectly good 350D.
And Tony, well Tony would just like to practice on anything breakable ;)

Title: Re: Scary things with a 450D
Post by: Tony G on Oct 19, 2009, 16:15:27

I might try this. :twisted:

Tony G

Title: Re: Scary things with a 450D
Post by: mickw on Oct 19, 2009, 16:19:20

Quotemight try

There is no try - do or don't do !

You have already mastered the light sabre ;)

May the farce be with you.............................

Title: Re: Scary things with a 450D
Post by: MarkS on Oct 20, 2009, 06:30:21

Mick,

That's a brilliant find - well done! It gives me lots of ideas for my 350D Peltier mod.

I like the way he disconnects ribbon cables to determine if they are important or not!

However, it seems a bit odd that he appears to have put the heatsink inside the aluminium box where it will warm everything up. Or have I misunderstood this part (first image in section 4).

His particular Peltier chip consumes 3.7A at 12v - I would need a whole car battery just dedicated to cooling.

Mark

Title: Re: Scary things with a 450D
Post by: mickw on Oct 20, 2009, 07:35:29

Quoteheatsink inside the aluminium box

I hadn't noticed that, there doesn't even appear to be an airflow over the heat sink, just a fan trying to suck air out of a sealed container.
Although he has sealed the "camera" in a poly bag which might help a bit.
He has managed some impressive improvements for what looks like an inefficient design though.

Also regarding your coldfinger clearance issues between the CCD - are you aware that you can get copper shim in various thicknesses down to around .003"

Title: Re: Scary things with a 450D
Post by: MarkS on Oct 20, 2009, 08:19:57

Quote from: mickw
are you aware that you can get copper shim in various thicknesses down to around .003"

That sounds interesting. Where from?

Mark

Title: Re: Scary things with a 450D
Post by: mickw on Oct 20, 2009, 15:48:25

QuoteWhere from?

A few here -
http://www.google.co.uk/search?q=copper+shim&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a (http://www.google.co.uk/search?q=copper+shim&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a)

Chronos list 26SWG which is about .4mm (unfortunately better sizes in brass)
http://www.chronos.ltd.uk/metal.pdf (http://www.chronos.ltd.uk/metal.pdf)

Orpington Astronomical Society

Astronomy => Technical => Topic started by: mickw on Oct 19, 2009, 15:09:29