Heat sink.

[Julian]

The files are all over 2MB, over the permissible size.

Maybe the forum software re sizes them for faster loading ... not sure, all a little beyond me, but I can re size them for you.  Can you send them to me by by email?

[greasemonkey]

Resizing thread.
http://www.biopowered.co.uk/forum/index.php/topic,271.15.html
 i used MS paint, or PC paint brush. i don;t recall which. Not to sure how I did it either, just physically shrink the picture, I think.

[Oilybloke]

Guys, many thanks for the replies. So am I right in thinking that it doesn't actually need to be connected or wired to anything, it is merely a way of dissipating heat from the control box? A la fins on an air cooled motor?

[1958steveflying]

Guys, many thanks for the replies. So am I right in thinking that it doesn't actually need to be connected or wired to anything, it is merely a way of dissipating heat from the control box? A la fins on an air cooled motor?

Yes the heat sink is just that.

[therecklessengineer]

Guys, many thanks for the replies. So am I right in thinking that it doesn't actually need to be connected or wired to anything, it is merely a way of dissipating heat from the control box? A la fins on an air cooled motor?

Exactly that. However, if it's in contact with a metal housing that you can touch then make sure it's earthed.

[Head Womble]

Julian, I've sent them to your website email address.

[Julian]

Julian, I've sent them to your website email address.

Got them, thanks.

I'm off down the pub for a curry and quiz, so I'll sort them out tomorrow.

[Tony]

Guys, many thanks for the replies. So am I right in thinking that it doesn't actually need to be connected or wired to anything, it is merely a way of dissipating heat from the control box? A la fins on an air cooled motor?

Exactly that. However, if it's in contact with a metal housing that you can touch then make sure it's earthed.

Very good point, what that man said - if it's metal - earth it!

[Rossey]

The transfer paste we use at work is call Dow Corning, or if you want to pass electricity through it we use bicon X1.

[julianf]

The transfer paste we use at work is call Dow Corning

Id like to think everyone knows this anyhow, but just in case...#

Dow Corning make loads of things, and not everything pasty would transfer the heat : )

[julianf]

Guys, many thanks for the replies. So am I right in thinking that it doesn't actually need to be connected or wired to anything, it is merely a way of dissipating heat from the control box? A la fins on an air cooled motor?

If your control box is aluminium (which a lot are) then i (personally) would not bother with a heat sink, providing the aluminium section is reasonably large.

Most sinks are made of al and, whilst they have fins etc. the heat we're talking about isnt vast, and a decent area of al case would dissipate the heat also.


Or...

If you dont feel confident with that, look out for an old computer psu.  Crack it open, and harvest the heat sinks from it.

[julianf]

...here's the remains of some e-scrap i killed earlier -





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