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2012-10-04 by kbyrne10
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
2012-10-04 by Leon Heller
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
2012-10-04 by kbyrne10
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 >
2012-10-04 by John Anhalt
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]2012-10-04 by Kevin Byrne
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 > [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]
2012-10-04 by Boots Hughston
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] > > [Non-text portions of this message have been removed]
2012-10-04 by Derek
Do a search on Google with the terms "pcb trace width and current". Select images and use the charts that have been in place for decades. A good picture is at http://www.ultracad.com/ipccha1.gif Easy charts to use. Based on current desired and temperature rise, say 10C. Use the top graph to find cross section of 7 sq.mils. Then go down one graph to the External Copper layers and, depending on copper thickness, say 1/2 oz, the trace width should be about 0.010. Use the bottom chart for internal copper layers. Derek Koonce DDK Interactive Consulting Services On 10/4/2012 8:32 AM, Boots Hughston 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@... > <mailto:kbyrne10%40yahoo.com>> 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@... <mailto:janhalt%40cox.net>> > > To: Homebrew_PCBs@yahoogroups.com > <mailto:Homebrew_PCBs%40yahoogroups.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 > <mailto:Homebrew_PCBs%40yahoogroups.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 > <mailto:Homebrew_PCBs%40yahoogroups.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] > > > > > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed]
2012-10-04 by Leon Heller
On 04/10/2012 16:32, Boots Hughston wrote: > I would not run 500ma through a 8/1000 trace. It will not handle it for > long. I checked it with the Pulsonix track width calculator, and it looks OK. For 1 oz copper, an 8 mil track with 500 mA going through it will heat up by 3.9 degrees C. Leon -- Leon Heller G1HSM
2012-10-04 by Kevin Byrne
http://www.extremecircuits.net/ This is a link to the web site of the calculator that I used. I am useing Eagle and ExpressSCH, and ExpressPCB and need to get this width right the first time as I am new and learning. Thank you for all the E-Mails to check out. Kevin ________________________________
From: Leon Heller <leon355@...> To: Homebrew_PCBs@yahoogroups.com Sent: Thursday, October 4, 2012 10:51 AM Subject: Re: [Homebrew_PCBs] Re: Copper Clad Board Info On 04/10/2012 16:32, Boots Hughston wrote: > I would not run 500ma through a 8/1000 trace. It will not handle it for > long. I checked it with the Pulsonix track width calculator, and it looks OK. For 1 oz copper, an 8 mil track with 500 mA going through it will heat up by 3.9 degrees C. Leon -- Leon Heller G1HSM [Non-text portions of this message have been removed]
2012-10-05 by adtranengineer
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] > > > > > > > [Non-text portions of this message have been removed] >