o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o
that’s about .125” in diameter. Use the fill and stroke tools
to remove the fill, and set the stroke to 0.5 pixels (px). Use
the width and height boxes in the Tool Controls bar to
resize the circle to 0.120” in diameter.
6. Click the Beziers curves tool, and while holding
down the Control key to constrain the direction of
movement, make a short line of about 1” in length.
(Double-click at the end of the line to finish it.)
7. Make a copy of this line (File->Copy, then File->Paste; see Figure 6), and choose Object->Rotate 90° CW.
Select both line segments, open the Align and Distribute
panel, and align the lines both horizontally and vertically.
Group these two lines by choosing Object->Group (or
press the Ctrl+G keys).
8. Resize these line segments to 0.20”, select both the
lines and the circle made in step 5, and align the objects
both horizontally and vertically. Group these two objects
so it’s easier to manipulate them.
9. Make three additional copies of the circle with
cross-hairs, and manually position all four into the corners
of the inner rectangle from step 1. The cross-hairs will help
you find the center of the hole when drilling. You’ll want
to zoom in real close (see Figure 7) so that you can
accurately position the cross-hairs for the mounting holes.
Laying Out Switches
and LED Holes
So far, so good. It’s now time to lay out the hole
patterns for the switches and LED indicators used on the
panel. These are made just like the four mounting holes,
so you can use the same techniques. For the sake of
visualization, I made the switch and LED holes for my
control panels at about the size of the actual hole, though
what really matters is the cross-hairs in the middle for
setting the drill.
To make a hole for any component (switch, LED, etc.):
1. Begin by copying one of the four mounting holes
made in the previous section. Ungroup the circle and
2. Adjust the diameter of the hole to just under the
actual dimension of the part. For example, for a switch
with a 1/4” shaft, make the circle no larger than 0.240”.
For a 5 mm LED, the closest fractional inch size is 0.197”,
so make the holes for your LEDs no larger than about
3. After resizing the circle, select both circle and cross-hairs, and re-align on the vertical and horizontal centers as
shown in Figure 8. Group the objects together to make it
easier to manipulate them. Make copies as needed.
The Intergalatic Interrogating Interocitor contains one
power switch and indicator light. I’ve positioned them in
the upper left corner and “eyeballed” their location. As
shown in Figure 9, four additional indicator LEDs are
placed within a box and are along the upper right of the
Figure 7. Zoom
in closer to
holes in the
corners of the
Figure 8. Other
holes can be
diameter of the
circle. Make the
circle a little
smaller than the
pane. For your control panels, you can position the
components wherever they look and fit best. Just make
sure not to overcrowd the parts. The area taken up by the
top (visible) portion of the component may be — and
usually is — less than the area taken up by the underside
portion. This is particularly true of things like toggle
switches, as they can have very fat bodies even though
the toggle handle takes up little space.
Be sure to leave enough space for wiring and other
termination requirements, as well. If a component
uses screw terminals, be sure there’s ample room for
April 2013 47