Data Sheet

LABCENTER ELECTRONICS LTD.
118
Let’s move on to the next net class in the selector; the ANSW class. You may remember that we
specifically named this net class in the Proteus Getting Started Guide in order that the 5V
switched power supply for the analog circuitry (the output of the DC/DC converter) could be
handled separately in the layout. What we want for these connections is a track size larger than
the standard SIGNAL net class but smaller than the POWER net class, so let’s change the
Trace Style to T15 (15th track). For consistency, the neck style can also be T15 and we can use
a smaller via (with the same 0.4mm hole) by selecting the V30 Via Style.
Specifying the ANSW net settings
If you don’t have a V30 via style you can create one easily by going to the Library
Menu, selecting New Via Style and filling out appropriately.
Creating your own net classes is extremely simple and provides you with the
flexibility you need both with regard to trace and via configuration but also with
design rule constraints
The final net class we have is the standard SIGNAL net class that encompasses all non-power
and unspecified connections. We’ve deviated from the widely used “8/10 Rules” (8th trace, 10th
clearance) in order to compensate for outdoor usage but the standard 8th track width (style T8)
is fine. We can also set the neck style to 8
th
and keep our standard V30 via style for these
connections.
Having finished configuration, exit the dialogue form to return to the layout.