FreePCB User Guide

 Version 1.2


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7. Tutorial (continued)

7.7 Adding Parts and Editing Nets

Modifying a PCB design by adding, replacing or deleting parts or changing the netlist is sometimes referred to as "on-the-fly" editing. FreePCB gives you virtually unlimited freedom for this type of editing. However, you should use this freedom carefully. Keep in mind that by modifying the partlist and netlist, you are creating a discrepancy between your PCB layout and the original schematic. If you make any significant changes you should carefully back-annotate them to the schematic, otherwise troubleshooting the PCB can be a nightmare. In general, "on-the-fly" editing is best used for relatively minor changes. If you need to perform more extensive redesign, you should probably go back to your schematic editor and create a new netlist file.

In this section, we will add three bypass capacitors to our PCB, one for each of the DIP ICs. We will connect them to the VCC and GND nets. Since FreePCB provides several methods for doing this, we will try them all.

 

In the next section we will use copper areas and stub traces to create power and ground planes for VCC and GND.

 


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