Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [symbol]

An electronic symbol is a pictogram used to represent various electrical and electronic devices

An electronic symbol is a pictogram used to represent various electrical and electronic devices (such as wires, batteries, resistors, and transistors) in a schematic diagram of an electrical or electronic circuit. These symbols can (because of remaining traditions) vary from country to country, but are today to a large extent internationally standardized. Some symbols represent components which ceased to be used routinely as newer technologies were introduced.

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What is this symbol: semicircles facing each other?

What does this symbol represent? It was found on the circuit diagram for a TDS973A a board for which this was the only information I was able to find online.
faire
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Weird resistor with dots around it on the schematic

I was looking through the LTC4041 datasheet and saw this: The 10mOhm resistor with the two nodes really close to it - is that a "special" resistor or something? Why have they drawn it like that?
AlfroJang80
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What does this symbol on a voltmeter looking like an upside down U with a small line under it represent?

I decided to start a new question because I have no idea what word describes it at best, let alone to do a research (aka googling) which can be a bit inconclusive. At first glance, it looks like it convincingly represents an LED, albeit not with…
Yudhi G.
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What is a "100R" resistor?

Sometimes I see references to "R" resistors. For example: Obviously the 100 refers to 100 Ohms. What does 100R mean?
Tyler Durden
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What do the arrows in transistor symbols point to (and from)?

Transistor symbols are often drawn with arrows pointing in one direction or the other, depending on type, like in the following symbols: But what is the arrow actually pointing at? And from where are they pointing? Is it the same principle behind…
Tron
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What do the line-and-circle symbols mean on these electric meters?

I was looking at an electrical installation and came across unfamiliar symbols on the front of a pair of meters. These are from three-phase 240v meters running on a timed system. One each for peak/off-peak usage. On the first image, I recognise part…
Ben
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Does anyone know the history of the earth ground symbol

I Googled for hours, asked every EE professor in my college, then checked every electrical engineering book in my university's library (hours), and have found nothing about the history of the ground symbol. Please point me if you can. Who coined…
Dave Sims
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What does a two overlapping circles symbol mean in an electrical schematic/diagram?

In the datasheet for a A3503 Hall Effect Sensor, I saw a circuit diagram labeled 'Functional Block Diagram', and it shows a symbol I have not seen before. It's shown here between 3 - Output and 2 - Ground. What is this supposed to represent? The…
Ehryk
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Use of ground symbols in circuit diagrams

In this question is the following diagram for a voltage booster intended for small battery powered devices The TPS61200 spec says GND is control/logic ground and PGND is power ground but this isn't reflected in the symbols chosen in the diagram.…
RedGrittyBrick
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What does a "fork" symbol mean on a schematic?

What does a "fork" symbol mean on this schematic: It was taken from page 6 of a motor driver datasheet: https://docs.rs-online.com/b7d1/A700000007487180.pdf
user13174343
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Anyone recognise this capacitor and its symbol (circle with dot)?

Trying to repair an old Hameg CRT oscilloscope and looking at the schematics for the HV Z board I see the following capacitor symbol (in red box): The capacitor itself looks (vaguely) like this: I'm not suggesting it is a vacuum dielectric cap, it…
Buck8pe
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What is this symbol? (assumed compliance mark like CE / FCC)

So Raspberry Pi have a new model out (the Raspberry Pi Zero W). Having taken a look at the photos, I see that on the reverse, where the CE and FCC compliance marks are shown, there is another symbol. It's hard to describe - something like a "T" with…
stefandz
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Why MOSFET source is indicated with arrow ?

I know that , a basic MOSFET contains source and drain , and either it's a NMOS or PMOS ; it is indicated by an arrow at source . But let's look at a fabricated NMOS. Here we can easily see that either a pin is source or drain is totally depended…
Anklon
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Strange diode symbol in schematic

Does somebody know what the parts "D1" (top left) and "D2" (bottom left) are? I would expect them to be a special kind of diode, but I have never seen this symbol before in 10+ years of electronics.
Marc
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What do multiple emitters/collectors imply in a BJT schematics symbol?

I sometimes come across with BJT symbols from which multiple lines come out of emitter or collector. Are such BJTs different kind of devices? What does it mean in solid-state level?
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