Loading a blinker relay.

[tekati]

Use heat sink compound between the car frame and the flat bottom of the resistor.

Edit: I see that I missed the fact that you already discovered aluminum cased power resistors. You are aware that you can series/parallel them to distribute the power dissipation over each of them?

I was wondering if heat sink compound would work like that so thanks for that tip I will try that. I did actually get two of the power resistors you are referring too and will try a single one to see if that will work. I think it is rated at 50W.

If that does not work I might try your suggestion on using multiples to distribute the weight.

 

[CDRIVE]

Check this out. Parallel two of them and you'll have 60 Ohms @ 500 Watts!

http://www.ebay.com/itm/Dale-RH-250...552?pt=LH_DefaultDomain_0&hash=item519f283db0

 

[CocaCola]

You can also just mount them to a slab of aluminum, you don't have to get all fancy with the heat sink... Yes, it wont be as good but it will still drastically improve performance...

And space permitting you can get surplus heat sinks for chump change, aluminum ones can be easily cut on a table saw or chop saw with a carbide blade to a better suited size... Mount the resistor to the base and mount the entire thing with long screws in a upside down fashion...

 

[tekati]

Check this out. Parallel two of them and you'll have 60 Ohms @ 500 Watts!

http://www.ebay.com/itm/Dale-RH-250...552?pt=LH_DefaultDomain_0&hash=item519f283db0

Except I really need 5.6 OHM but 6 OHM would work but not 60 OHM. Plus this needs to be kept reasonably compact.

 

[CDRIVE]

Except I really need 5.6 OHM but 6 OHM would work but not 60 OHM. Plus this needs to be kept reasonably compact.

Sorry about that. I could have sworn I saw you post 60 Ohms in an earlier post. I should have caught that though, as 60 Ohms would certainly not draw the current you want. Though, there were values close to what you want on ebay. BTW, compactness and heat dissipation will make for a contentious marriage.

 

[CocaCola]

Sorry about that. I could have sworn I saw you post 60 Ohms in an earlier post.

This happens to me all the time if the space is skipped when typing it, your mind sees 60 when it encounters 6Ohms that space makes all the difference or better yet 6Ω...

 

[CDRIVE]

This happens to me all the time if the space is skipped when typing it, your mind sees 60 when it encounters 6Ohms that space makes all the difference or better yet 6Ω...

Ha, too funny! That's exactly what I saw but I shouldn't have missed that 60 Ohms is 10 times outside the ball park though.

 

[duke37]

CocaCola

Where do you find omega?

Duke

 

[CDRIVE]

Type charmap at the command prompt. It'll bring up the windows character map. Once you have it up and see how it works, look down in the right hand corner of the window. You'll see the ALT+nnnn key strokes to generate it from the keyboard. The numeric key pad must be used though.

This example of 6Ω was just copied and pasted using the charmap's copy function .

It would be nice if we had an electronics and math symbol pallet right under our smilies though.

 

[CocaCola]

Where do you find omega?

I used to do it manually with using an ALT key chart, now I have a small free macro program to automate it, you configure it to whatever special characters you want using the an ALT key chart and then it's just a simple Windows + C keystroke to pull up a list of those characters to insert into your text as you type...

I have attached the program for anyone that wants it to the post, it's was freely distributed software when released, but the authors site is long gone so obviously not supported any longer...

Just extract to a folder on your computer and make sure you place a shortcut to the executable in your Windows start up so that it runs every time Windows boots... You can edit the Char.ini file in notepad, use a ALT key chart to input the characters you want... The Chars.ini file layout is a little awkward in the way you input the characters and the way they are displayed in the popup window but not overly hard to figure out...