Most of the electrical symbols can be changed in their appearance, styles and colors according to users' requirements. Electrical symbols are used to represent various electrical and electronic devices in a schematic diagram of an electrical or electronic circuit.
The following table lists some electron tubes electrical symbols in our electrical diagram software.
| Symbol |
Meaning |
| Electrical Symbols — Electron Tubes |
 | Diode, directly heated |
 | Diode, indirectly heated |
 | Diode, envelope, direct. heated |
 | Diode, envelope, indirect. heated |
 | Triode, directly heated |
 | Triode, indirectly heated |
 | Triode, envelope, direct. heated |
 | Triode, envelope, indirect. heated |
 | Tetrode, directly heated |
 | Tetrode, indirectly heated |
 | Tetrode, envelope, direct. heated |
 | Tetrode, envelope, indirect. heated |
 | Pentode, directly heated |
 | Pentode, indirectly heated, external connection |
 | Pentode, indirectly heated, internal connection |
 | Pentode, envelope, direct. heated |
 | Pentode, envelope, indirect. heated, external connection |
 | Pentode, envelope, indirect. heated, internal connection |
 | Diode, directly heated 2 |
 | Diode, indirectly heated 2 |
 | Diode, envelope, direct. heated 2 |
 | Diode, envelope, indirect. heated 2 |
 | Triode, directly heated 2 |
 | Triode, indirectly heated 2 |
 | Triode, envelope, direct. heated 2 |
 | Triode, envelope, indirect. heated 2 |
 | Tetrode, directly heated 2 |
 | Tetrode, indirectly heated 2 |
 | Tetrode, envelope, direct. heated 2 |
 | Tetrode, envelope, indirect. heated 2 |
 | Pentode, directly heated 2 |
 | Pentode, indirectly heated, external connection 2 |
 | Pentode, indirectly heated, internal connection 2 |
 | Pentode, envelope, direct. heated 2 |
 | Pentode, envelope, indirect. heated, external connection 2 |
 | Pentode, envelope, indirect. heated, internal connection 2 |
One classification of vacuum tubes is by the number of active electrodes, (neglecting the filament or heater). A device with two active elements is a diode, usually used for rectification. Devices with three elements are triodes used for amplification and switching. Additional electrodes create tetrodes, pentodes, and so forth, which have multiple additional functions made possible by the additional controllable electrodes.
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Semiconductors are crystalline or amorphous solids with distinct electrical characteristics. They are of high resistance — higher than typical resistance materials, but still of much lower resistance than insulators. Their resistance decreases as their temperature increases, which is behavior opposite to that of a metal. Finally, their conducting properties may be altered in useful ways by the deliberate, controlled introduction of impurities into the crystal structure, which lowers its resistance but also permits the creation of semiconductor junctions between differently-doped regions of the extrinsic semiconductor crystal. The behavior of charge carriers which include electrons, ions and electron holes at these junctions is the basis of diodes, transistors and all modern electronics.
26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
Picture: Electrical Symbols — Semiconductor
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This sample represents an electrical and telecommunication floor plan. Electrical and telecom floor plans contain a floor plan , on which imposed the layout of electrical, and telecommunications equipment. They shows electrical and telecom details regarding the current floor of a building: lightening, fixtures, wires, outlets, circuit panels, etc. Using of standart notation of electrical and telecommunication symbols makes the plan understandable for engineers, architects, constructors, specialist in electricity and telecommunications.
Picture: Electrical and Telecom Plan Software
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Picture: Healthy Food Ideas
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Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 MHz and 3 GHz, also known as the decimetre band as the wavelengths range from one meter to one decimetre. Radio waves with frequencies above the UHF band fall into the SHF (super-high frequency) or microwave frequency range. Lower frequency signals fall into the VHF (very high frequency) or lower bands. UHF radio waves propagate mainly by line of sight; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for television broadcasting, cell phones, satellite communication including GPS, personal radio services including Wi-Fi and Bluetooth, walkie-talkies, cordless phones, and numerous other applications.
26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
Picture: Electrical Symbols — VHF UHF SHF
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Digital electronics or digital (electronic) circuits are electronics that handle digital signals – discrete bands of analog levels – rather than by continuous ranges (as used in analogue electronics). All levels within a band of values represent the same numeric value. Because of this discretization, relatively small changes to the analog signal levels due to manufacturing tolerance, signal attenuation or parasitic noise do not leave the discrete envelope, and as a result are ignored by signal state sensing circuitry.
26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
Picture: Electrical Symbols — Analog and Digital Logic
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Picture: Business Processes description with ConceptDraw DIAGRAM
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Picture: Flow Chart Example: Warehouse Flowchart
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Picture: Electrical Symbols — Switches and Relays
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26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
Picture: Electrical Symbols — Stations
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A qualifying symbol is graphics or text added to the basic outline of a device’s logic symbol to describe the physical or logical characteristics of the device.
26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
Picture: Electrical Symbols — Qualifying
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. To connect elements using this tool, drag the connector from one connect dot to another.You can use Layers to place connections on different layers.
