Page 207 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards

FIGURE 8-8 Key components positioned on the board.

We now need to drag on all the transistors and resistors. Because most of the “Digital IO” pins at
the top of the board will have a resistor attached to them, drag over the appropriate resistors,
positioning them under their input-output (IO) pin and rotating them as appropriate.

The transistors can be placed within the outline for the display. Because the display stands a little
off the PCB, they can be on the top layer.
Figure 8-9 shows all the components on the board. Note that the air wires around the transistors
seemed to be crossing over rather a lot, so they were rotated. It was also noticed that the buzzer has a
polarity and that the positive (+) connection was currently to ground. The pins were swapped over in

the schematic.