Basics
Units and coordinates
Millimetres by default, unit strings for everything else, Y growing down and rotation counter-clockwise on screen.
- Lengths are numbers in millimetres, or strings with a unit:
"0.2mm","8mil","35um","0.1in","1oz"(copper, 35 um). - A point is
[x, y]. X grows to the right, Y grows down, for symbols and footprints alike. - Rotation is in degrees, counter-clockwise as seen on screen.
- Current
"2A"/"500mA", impedance"50ohm", temperature rise"10C", tolerance"10%".