04-03-2013, 04:44 PM
PCB Design Presentation
[attachment=52564]
What is PCB
Printed Circuit Board
Electronic Board that connects circuit components
PCB populated with electronic components is a printed circuit assembly (PCA)
PCBs are rugged, inexpensive, and can be highly reliable
Mass manufacturing
Professional
Materials of PCB
Conducting layers are typically made of thin copper foil.
The board is typically coated with a solder mask that is green in color. Other colors that are normally available are blue and red.
Unwanted copper is removed from the substrate after etching leaving only the desired copper traces or pathways
Components
Components are the actual devices used in the circuit.
This includes input/output connections.
I/O ports, including power supply connections, are also important in the PCB design.
Pads
Location that components connect to.
You will solder components to the pads on the PCB.
Pads will connect to traces.
Pads have an inner diameter and outer diameter.
Traces
Traces connect pads together.
Traces are essentially the wiring of the PCB.
Equivalent to wire for conducting signals
Traces sometimes connect to vias.
High current traces should be wide.
Signal traces usually narrower than power or ground traces
Jumpers
Often, many signal wires need to exist in too small of a space and must overlap.
Running traces on different PCB layers is an option.
Multilayer PCBs are often expensive.
Solution: use jumpers
Heat Dissipation-Heat Sinks
Heat sink dissipates heat off the component
Doesn’t remove the heat just moves it
Some components may get hot. Make sure you get a large enough heat sink.
Data sheets specify the size of the heat sink
A short circuit may result when two devices share the same heat sink
[attachment=52564]
What is PCB
Printed Circuit Board
Electronic Board that connects circuit components
PCB populated with electronic components is a printed circuit assembly (PCA)
PCBs are rugged, inexpensive, and can be highly reliable
Mass manufacturing
Professional
Materials of PCB
Conducting layers are typically made of thin copper foil.
The board is typically coated with a solder mask that is green in color. Other colors that are normally available are blue and red.
Unwanted copper is removed from the substrate after etching leaving only the desired copper traces or pathways
Components
Components are the actual devices used in the circuit.
This includes input/output connections.
I/O ports, including power supply connections, are also important in the PCB design.
Pads
Location that components connect to.
You will solder components to the pads on the PCB.
Pads will connect to traces.
Pads have an inner diameter and outer diameter.
Traces
Traces connect pads together.
Traces are essentially the wiring of the PCB.
Equivalent to wire for conducting signals
Traces sometimes connect to vias.
High current traces should be wide.
Signal traces usually narrower than power or ground traces
Jumpers
Often, many signal wires need to exist in too small of a space and must overlap.
Running traces on different PCB layers is an option.
Multilayer PCBs are often expensive.
Solution: use jumpers
Heat Dissipation-Heat Sinks
Heat sink dissipates heat off the component
Doesn’t remove the heat just moves it
Some components may get hot. Make sure you get a large enough heat sink.
Data sheets specify the size of the heat sink
A short circuit may result when two devices share the same heat sink