Virtually every electronic product is constructed with one or more printed-circuit boards (PCBs). The PCBs hold the ICs and other components and implement the interconnections between them. PCBs are created in abundance for portable electronics, computers, and entertainment equipment. They are also made for test equipment, manufacturing, and spacecraft.

1. Express PCB
Presented by-
Kunal Pandhram
1
ElectrohybridTech

2.  Double click on ExpressPCB icon .
 Click on ‘Place a component’
 Select required footprints and place on board.
 If any of the footprint is not available in
library, create
new footprint.
 Label footprints. Ensure to use same labels as
used in
Express schematic.
 Arrange footprints properly
 Link Circuit schematic to ExpressPCB.
 Use ‘Place a trace’ to connect highlighted
pads.
Steps to create PCB layout using ExpressPCB
ELECTROHYBRIDTECH
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3. Practice circuit
LDR,
Power
supply to
be
connected
off board
via 4-pin
connector
Copy file TimerSwitch.sch on PC where you are working with
Express PCB
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4. Double click on
ExpresspPCB
icon
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5. ExpressPCB screen shot
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6. Click on ‘Place a
component’
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7. Select desired footprint from
library
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8. Place footprint on board
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9. Double click on footprint. Give
label as per schematic diagram
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10. ELECTROHYBRIDTECH 10

11. Component Label Express PCB footprint
Capacitor (Electrolytic) C1 Cap-Radial Electrolyte Lead Spacing0.138inch
Capacitor (non-electrolyte) C2 Cap-Lead spacing 0.2 inch
¼ watt resistors R2,R3,R4 Resistor 0.25watt(lead spacing 0.4inch)
Potentiometer VR1 Potentiometer-Bourns-series3386F
LED D LED T 1.75
IC 555 IC DIP-8
Transistor SL100 Q TO-39
Connector CON Connector-Molex-.1inchKK,up 4 pin
Express PCB Library footprints- parts ID
names
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12. Select and place all available
components in library
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13. Creating new
footprint
Ensure you have following information
–
 Pin arrangement and dimensions
 Pin identification
 Pin numbers as assigned in Express
Schematic
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14. Pin arrangement and
dimensions
Pin identification
Pin numbers as assigned in Express Schematic
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15. Click on ‘View’
Select ‘Options”
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16. Note grid
spacing
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17. 1. Click on ‘
Place a pad’
2. Select pad
dimensions
3. Place pad on
grid point
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18.  Copy pad
 Paste 4 more pads on
board
 As corner pads are
12mm(0.5inch) apart,
place corner pads
considering grid spacing
0f 0.1 inch
 Place central pad 0.1 inch
above and at middle of
top corner pads.
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19. 1. Click on ‘
place a trace ‘
2. Select
silkscreen
layer
3. Draw
footprint outline
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20. Double click on each pad and
assign pin numbers. Pin numbers
should be consistent with pin
numbers of Express Schematic
component
2 1
5
4
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21. Select whole
component
Open ‘component’
menu
Select ‘ Group to
make component’
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22. Double click on component
Assign part ID ( Label) same as
in Express Schematic
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23. Now start
arranging
footprints within
board area
Start with
component from
which many
branches are
emerging, like IC.
Place other
components
such that they are
near to IC pins
and cross over
are avoided
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25. Go to file
Select option ‘
Link schematic
to PCB
Select file to be
linked.
TimerSwitch.sch
in this case.
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26. Now click on
‘Place a
Trace’
Click on One
of the pads.
Pads to be
connected
are
highlighted
in blue.
Footprints can
be rearranged
as and when
required at
any stage
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27. R4 is
rearranged.
Diode D is
rotated
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28. Now start
routing-
1. Click on
‘place a
trace’
2. 2. Select
trace width
of 0.050”
3. Click on one
of the pads.
4. Place trace
between
highlighted
padsELECTROHYBRIDTECH 28

29. Change trace width to 0.030’
while connecting pads internally.
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30.  R3,R4,LED,Transis
tor, VR1 are
suitably
rearranged to
avoid cross over.
 Text is added for
reference and
easy
identification.
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31. Select whole
layout. Move close
to top left corner.
Drag corners to
adjust board size.
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33. Place holes for
mounting
screws
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34. Go to ‘File’
menu.
Select ‘Print’
option
Check ‘
Silkscreen, pads,
and text’ layer
And take print
on normal paper
Take print on
normal print
paper
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35. Select whole
Layout.
Move the
Layout to
bottom copper
layer.
Click to move selected layout to
bottom copper layer
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36. Go to ‘File’
menu.
Select ‘Print’
option
Check ‘Bottom
copper layer’
Take two prints-
one on
photographic
sheet, other on
normal print
paper
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Thank You !
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