Kevin wrote:

> http://www.olimex.com/pcb/index.html indicates FR-4, thickness 1.5mm
> (0,062"), copper 35um (1oz), Can I assume this is 1 oz/ft^2 as required
> by the Track width calculator page ?

Yes. 1 oz/ft^2 is 35 um thickness. Knowing the actual thickness, rather
than the not very useful number of ounces per square foot, helps you
calculate the cross-section area and with that the resistance of the copper
traces yourself. With this you can sanity-check the results of any
calculators out there.

> Max Current for the application is 1.4A @ 8.4V. So that tells me I should
> use a track width of 65mils with 25 mils of clearance, correct ?

That sounds safe. You can even use smaller traces, and unless you have a
number of traces with that current in parallel, the clearance can me
smaller, too.

Gerhard

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