Electrical Symbols Library for Drawing Schematics in PowerPoint

1
Electrical Symbols Library for Drawing Schematics
in PowerPoint

• For best results
• Turn snap-to-grid-on
• Do not scale the symbols library. Draw entire
  schematic first, then scale to desired size.
• After rotation, press up/down and sideways arrow
  keys to realign the component with the grid.

Actives
Passives
Sources
Discretes
2
OpAmps, OTAs Buffers
3
Transducers
4
Misc.
5
How Do Things Get Off-the-Grid?

• Whenever an object is moved, PowerPoint aligns
  one of the edges of the bounding box with the
  grid. Therefore, if the components bounding box
  is not exactly an integer number of grid units in
  size, when the component is moved, its terminals
  may move off the grid.

Other edge of bounding box aligns with grid
Bounding box aligns with grid
Invisible PowerPoint Grid (Enlarged)
Terminal not aligned with grid
Move Left
Move Left Again
Component with a bounding box that is not an
integral number of grid units
When the component is moved to the left, the
terminals become misaligned with the grid.
Aligning connection lines with the terminals is
impossible because newly drawn lines are snapped
to the grid.
Moving left or right will not realign the
terminals with the grid. To realign with the
grid, the component or the connecting lines need
to be nudged.
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How Can We Ensure They Stay On-the-Grid?

• The components in this library were carefully
  designed so their bounding boxes are an integer
  number of grid units. Therefore, when the object
  is moved, the component terminals stay aligned
  with the grid.

Both edges of bounding box align with grid
Terminal stays aligned with grid
Invisible PowerPoint Grid (Enlarged)
Move Left
Move Right or Left
Component with a bounding box that isan
integral number of grid units
When the component is moved to the left, both
edges of the bounding box align with the grid and
the terminals stay aligned with the grid.
The component and its terminals stay aligned with
the grid as it is moved left or right.
7
Another Way Things Get Off-the-Grid

• When multiple items are selected, the bounding
  box is the smallest box that contains the
  bounding boxes of all the selected items. When
  moving groups of selected items, your components
  can get moved off the grid. A work-around is
  shown on the next slide.

Bounding box aligns with grid
Invisible PowerPoint Grid (Enlarged)
Terminal not aligned with grid
Move Left
The joint bounding box of the component and the
text label is shown here.
Because PowerPoint snaps the location so an edge
of the bounding box lines up with the grid, when
the component is moved to the right, the
terminals become misaligned with the grid.
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How to Move Several Selected Items and Still Stay
on the Grid

• Draw a box that is bounds all of the objects that
  you need to move (including their complete
  bounding boxes).
• Select all the objects to be moved and the the
  newly created box.
• Jointly move the selected objects to the desired
  location.
• Delete the box made in step 1.

R1
Move
The newly created box contains the objects to be
moved. Its size is an integer number of grid
units.
Because the joint bounding box is an integral
number of grid units, when the selected
components are moved, the terminals remain
aligned with the grid.
Delete the extra box. The component terminals
should remain on the grid.
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Golden Rule

• To ensure things stay on the grid when they are
  moved, the bounding box of the object(s) being
  moved should be an integral number of grid units
  in size.