Homebrew PCBs

Thanks for the math. It is a study I struggle with. The web site I talked about has a way of putting oz formula into the calculator I did not know about.
Example current 500mA, spec.trace width - inch, spec. length 4in. Answer  comes out to 0.00878in trace  width @  500mA. That is what I was after. Best to you and thank you for clearing that up
from  myself. Kevin


________________________________
 From: John Anhalt <janhalt@cox.net>
To: Homebrew_PCBs@yahoogroups.com 
Sent: Thursday, October 4, 2012 8:29 AM
Subject: Re: [Homebrew_PCBs] Re: Copper Clad Board Info
 

  
35 microns = 35x10^-3 mm

(35X10^-3mm) ÷ (25.4mm/in) = 1.38X10^-3 inch =  1.38 mil

John

----- Original Message ----- 
From: kbyrne10 
To: Homebrew_PCBs@yahoogroups.com 
Sent: Thursday, October 04, 2012 9:02 AM
Subject: [Homebrew_PCBs] Re: Copper Clad Board Info

Thanks for the help. Is there a good conversion calculator site available as I suffer thru math?

--- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote:
>
> On 04/10/2012 11:54, kbyrne10 wrote:
> > I know of a trace calculator on a web site for determining width's of
> > traces but I need a question answered. If I buy stock PCB boards what is
> > the thickness of the copper itself? It asks for thickness like 1mil,
> > 2mil, 5mil, & 10mil. To be exact I need to figure this out. Thank you Kevin
> 
> Copper thickness for most board material available to hobbyists is 1 oz 
> per sq. ft. which equates to 35 microns.
> 
> Leon
> -- 
> Leon Heller
> G1HSM
>

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