Homebrew PCBs

You also need to consider voltage drop if you are planning on 500mA. Personally, I would use a 50 mil trace for 500mA if you are talking about a power supply voltage. If you don't care about voltage drop or inductance, take what the calculator says and increase by 2X (you want to be conservative).

Don

--- In Homebrew_PCBs@yahoogroups.com, Boots Hughston <boots2b1@...> wrote:
>
> I would not run 500ma through a 8/1000 trace. It will not handle it for long.
> 
> Boots-2b1
> 
> Sent from my iPhone
> 
> On Oct 4, 2012, at 7:37 AM, Kevin Byrne <kbyrne10@...> wrote:
> 
> > 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@...>
> > 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
> > >
> > 
> > [Non-text portions of this message have been removed]
> > 
> > [Non-text portions of this message have been removed]
> > 
> > 
> 
> 
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