to-220 (another eagle question)

[snipersquad100]

Has anyone got a To-220 heatsink footprint for eagle? 

[c4757p]

Seriously?

There are many different TO-220 heatsink designs. And if it doesn't take you about three minutes to draw it into a footprint from the manufacturer's drawing, that's a sign you need to practice doing so...

[snipersquad100]

There's always one know it all.

[chibiace]

i think one of the regulators from the sparkfun lbr has a heatsink attached.

[c4757p]

I'm not trying to be a know-it-all, I'm serious. Why would you want just a "generic TO-220 heatsink"? Wouldn't you want it to match one that you plan on using?

[snipersquad100]

Thanks chibiace. 

To the other guy, I don't want to learn how to make my own footprints, I just want to use em. Im not a designer im a novis electronic hobbyist who just wants to make pcb's just for fun.

[Dave]

To the other guy, I don't want to learn how to make my own footprints, I just want to use em. Im not a designer im a novis electronic hobbyist who just wants to make pcb's just for fun.

Yes, because drawing a footprint is something that can and should only be done by professionals. Hobbyists might get seriously injured!

[c4757p]

To the other guy, I don't want to learn how to make my own footprints, I just want to use em. Im not a designer im a novis electronic hobbyist who just wants to make pcb's just for fun.

Making a footprint is easier than a whole PCB... and everyone who makes PCBs makes footprints. There really isn't anything to learn, placing stuff in a footprint is just like placing stuff on a pcb.

- the other guy

[snipersquad100]

read comment 6

[WarSim]

I'm not trying to be a know-it-all, I'm serious. Why would you want just a "generic TO-220 heatsink"? Wouldn't you want it to match one that you plan on using?

Anyone could send you what they call a "generic" heat sink footprint.  Unfortunately there is no such thing. 
Firstly there are three general in dependant categories vertical horizontal and lateral.  Which are you seeking? 
Then there are several different mounding methods and vane profiles.  None are generic. 
You request seems to be asking for a collection of what others have made with not indication of scope. 
Heat sinks are selected by requirements and thus far you seem to be asking for a solution for any/all requirements or random requirments. 

[WarSim]

c4757p

Your message was selected when I intended to reply to the author.  I was not replying to you.  I tapped in the wrong place. 

[Monkeh]

To the other guy, I don't want to learn how to make my own footprints, I just want to use em. Im not a designer im a novis electronic hobbyist who just wants to make pcb's just for fun.

You don't want to learn how to draw lines in exactly the same tool you're already drawing lines in?

[tszaboo]

Not sure if OP is trolling us or not, but if you are that lazy, just use a D2PACK package part and draw your own heatsink on the copper.

[Kjelt]

Anyone using eagle some day some part you get zilch on the existing parts and footprint search and you just have to learn to draw it yourself. Or beg on an electronics forum for some fool to do it for you  Its not that difficult after you tried some and on youtube there are geat video tutorials that help.

[snipersquad100]

Any to220 heatsink will do as its only a dummy load im attempting.  I found one now.
Thanks for the help.

[Monkeh]

You could've drawn one in a matter of minutes.

[c4757p]

Any to220 heatsink will do as its only a dummy load im attempting.  I found one now.

Whoa there - a dummy load? That's often the exact opposite of "any TO-220 heatsink will do". How much power do you plan on dissipating?

[snipersquad100]

haven't gota clue lol, It might catch fire.

[Monkeh]

 

[c4757p]

I've definitely used that method before...

Do you already have the heatsink on hand, or are you planning on buying it? I'd recommend either grabbing its datasheet or finding a similar one's datasheet, and doing a quick temperature computation. Take the thermal resistance of the heat sink, add about 2C/W for the transistor case, and multiply by the power you plan on burning to find how much the temperature will rise.

Or go backwards to find the maximum power you can burn, based on about 80-100C maximum temperature.

[snipersquad100]

I haven't gota clue what your on about  , I get a bigish one and if it gets to hot I turn it off.

[snipersquad100]

ive zipped the eagle file with 7zip if you wanna have a look and have a laugh lol

[mariush]

Here, let me give you a clue... something like this if good for about 20-30 watts, maybe a bit more with a basic fan blowing air over it:

It's a current load similar to the one here : http://www.sleepyrobot.com/?p=136  I just used a different n-channel mosfet, I believe it was fqp50n06l but I can't be bothered to check if it's exactly this.

When I tested it, it was doing about 12v @ 2-3A  (24watts+) just fine, and the heatsink was hot but you could still touch it.

This heatsink has a rating of about 4c/w .

[snipersquad100]

thank you for that, I was thinking of something like that. Ive been looking at ian scott Johnston web site who uses a (rs component item nr 271-870)  heatsink for his dummy load, I think its a neat idea to house the pcb in the heatsink.