Homemade heatsink

[BZOFIQ]

People keep talking about US pennies not being made of copper, but the original poster is in Poland where they are 70% copper.

That's because he said pennies and not grosze; duh :p

BTW if I recall correctly 1 grosz is even smaller than a penny, providing nearly no mass, regardless of material.

That said, even if grosz was made out of pure copper and copper has great thermal conductivity but you only use .5 gram of it there is no sink in the heatsink - if that makes sense.

but hey, polak potrafi!

 

[Darsh]

That's because he said pennies and not grosze; duh :p

BTW if I recall correctly 1 grosz is even smaller than a penny, providing nearly no mass, regardless of material.

That said, even if grosz was made out of pure copper and copper has great thermal conductivity but you only use .5 gram of it there is no sink in the heatsink - if that makes sense.

but hey, polak potrafi!

For comparison, sorry but I don't have any Murican coins or tape measures :p

I'm not Polish but I've been living here about 6 years so I very much think like a Polish person ;)

 

[BZOFIQ]

I'm not Polish but I've been living here about 6 years so I very much think like a Polish person ;)

Cool, where in Poland?

 

[Darsh]

Cool, where in Poland?

Poznań :)

 

[oreo54]

You need them dated pre-2014..
most of yours "look" brass plated steel.
I suspect those might not be as easy to find considering their melt value probably exceeds their currency value.. ;)

Each "old" 1 grosz = .95g copper..
1G copper = 1 cent US (copper spot price) ($6.22 US /kilo)\
Exchange rate is about .23 to one for the Euro .26 for US
https://www.thebalance.com/the-copper-penny-is-worth-more-than-one-cent-809218

 

[Darsh]

You need them dated pre-2014..
most of yours "look" brass plated steel.
I suspect those might not be as easy to find considering their melt value probably exceeds their currency value.. ;)

I have a mix of pre and post 2013 coins. To be honest none of them are worth anything haha

 

[Stigigemla]

I wouldnt use anything of copper near the tank. Its to poisonous to me.

 

[RalphTech]

Are you thinking of pounding the pennies thin? Abe wouldn't like that. I recently saw a YouTube of a guy splitting and hammering copper water pipes thin enough to shape rose petals and the leaf.
My new LED headlight bulb has a aluminum ribbon that you spread apart like a rose to dissipate heat.
Just my unsmashed 2 cent.

 

[RalphTech]

Are you thinking of pounding the pennies thin? Abe wouldn't like that. I recently saw a YouTube of a guy splitting and hammering copper water pipes thin enough to shape rose petals and the leaf.
My new LED headlight bulb has a aluminum ribbon that you spread apart like a rose to dissipate heat.
Just my unsmashed 2 cent.

 

[Aquavaj]

Are you going to pound these coins down? That's gonna be a lot if work. And for best thermal conductivity the heatsink should be one continuous piece. If you melt them down you'll need a mould to cast the heatsink. The contact area will need to be as smooth as possible too.

 

[Darsh]

I think I won't do it at all let alone pound it of melt and cast. It would mean a lot of work.
I think there are easier ways like cutting aluminium square pipes or whatever they're called.

 

[burnetb1]

Aluminum is definitely an easier to work with material for this application. If you are set on using copper, I would suggest to look for old server computers. My company had a basement full of old computers that I started to dismantle for parts and found a couple of the nicer servers had full copper heat sinks. Suckers are heavy though...

 

[BZOFIQ]

...Suckers are heavy though...

And that's what makes them great.