An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit.These symbols are largely standardized internationally today, but may vary from country to country, or engineering discipline, based on traditional conventions.
Wiring Diagram Symbols. The standardized wiring diagram symbols chart has been updated recently to reflect recent additions of semiconductor components, including the solid state diode and transistors. Notice the similarity between these symbols and many of the ones in the ARRL Handbook chart. Resistor Color Code . RETMA Color Code Chart
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