PCB Design Glossary


Browse the glossary using this index

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R

RefDes

Short for Reference Designator.  Every component in every schematic and board file needs a unique identifier.  These can be any alphanumeric character string, but the convention and best practice is to use a letter to indicate the component type and a number that is incremented with each successive component type. 

For example, three resistors on a board would be labeled R1, R2, and R3, even if they had identical values.


Common Reference Designators
Prefix Component
A Assembly
B Battery
C Capacitor
 D Diode
DS  Display
 F  Fuse
FB   Ferrite Bead
J  Jack
 L  Inductor
 Motor
 MK  Microphone
 Plug
 Transistor
 Resistor
 Switch
 Transformer
 TP  Test Point
 U  Integrated Circuit
VR   Voltage Regulator
XTAL   Crystal
 Y  Oscillator


Resistor

These components restrict current flow between two nets in an electrical circuit.  The amount of current is proportional to the potential difference between the two nets.  Resistors are passive components.


Royal Circuit Solutions

Royal Circuit Solutions and Royal Flex Circuits are companies in California that specialize in small-batch, prototype, and custom printed circuit boards.  Royal Circuit Solutions is the principal sponsor of this course.

Visit their website here:

https://royalcircuits.com

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