Page 99 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards

Having added the basic component shapes, you can then go through and set their values according
to Table 4-1. D1 and D2 have rather long and overly specific values, so change them to be just
1N4148. You will have to override the warning that they have no user-definable values. This is also
a chance to rename the microphone to something more obvious such as MIC1.

With all the components named and the terminal block J1 added, your collection of components
should be looking like Figure 4-15.

FIGURE 4-15 Setting component values and renaming.

We can now start positioning the components in the approximate location where they will be
needed. It is best to place the big multipin devices first, fairly centrally, and then place the other

components around them. Logically, the amplifier stage using IC1 happens before the LED bar-code
chip does its thing, so put the op amp to the left.
Position and rotate all the components where necessary until they look like Figure 4-16.
Remember that you can rotate when you are in Move mode just by right-clicking the mouse.