PCBTrace : PCB Design App PCB Trace app calculates the width of the trace for a PCB board. A handy tool for Electrical Engineers. Anyone who is involved in designing or reviewing a PCB, needs this essential tool. Engineering students can use this for their projects at university. This industry standard app can be used by anyone, with the help of its intuitive interface. This app takes current, temperature rise, ambient temperature, trace thickness and trace length as input to determine the required width, resistance, voltage drop and power loss. http://itunes.apple.com/us/app/pcbtrace/id363228112#