Questions tagged [symbol]
An electronic symbol is a pictogram used to represent various electrical and electronic devices
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What is this dumbbell looking symbol on this schematic? (looks like jumper pad, but with a short)
Regarding to SJ1 and SJ2 in this schematic:
On the board it looks like two ordinary copper pads but with a thin connection between them. Is it meant to be a way to open the circuit by scraping off ...
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19 views
Proteus 8.6 pin names disappear after creating schematic symbol
I selected "Draw name" after placing the pin, but after I created the symbol (which I placed in a user created library) and placed the newly created symbol in the schematic, all of the pin names ...
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2answers
2k views
What does this circuit symbol mean? [duplicate]
I'm a student who is trying to build a wah pedal for a guitar. I came across this diagram for how to wire the circuit (from this site) :
Within the diagram, I am not sure what the following symbol ...
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1answer
190 views
∀ (for all) in voltmeter specification
I am working on a voltmeter and the tolerance for it is 0.25% ∀ 1 digit. I am not sure what exactly what this means. I am guessing if my value was 19.95 'for all' could mean I have a range of ...
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39 views
Spark gap schematic symbol help
I disassembled a Sharp 42" LCD TV power supply board and discovered 3 glass Spark Gap components (Gas Discharge Tube/Surge Absorbers). I haven't worked with them before and I'm curious about the ...
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1answer
65 views
Power Source Symbol — Which to use (Arrow, Bar, Circle, etc.)?
I'm wondering if there is anyone out there with a definitive answer to why and/or what standard would call out the usage of the different voltage sources. There are Bars, Arrows, Dots, Waves, etc. I ...
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1answer
63 views
Identify this symbol: circle with arrow across
What could be the meaning of the circle with an arrow diagonally across it? I haven't seen this anywhere before.
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80 views
Can someone identify this transistor and/or resistor component?
I stumbled upon a weird transistor or resistor component which I can't place. Here is a simplified version of the circuit:
I am pretty sure that the transistor on the bottom is an N-MOS transistor ...
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1answer
83 views
What is this Venn-Diagram-looking symbol?
So I am looking at the datasheet for the LTC4416, and there is this Venn-diagram symbol after the op-amp, but I don't think it is supposed to be an inverter. It is also used for these currents, but ...
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169 views
Are these (dis)assembly screw symbols standardised?
Sometimes there are these two half-arrow symbols on PCBs and on enclosures. See the images, for examples.
Those symbols are often placed near the screws, that are to be unscrewed upon disassembly.
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2answers
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What does this symbol on the box of power supply mean?
I always see this symbole behind electronic devices.
A close-up image of the symbol:
What does it mean?
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1answer
44 views
What is the two-pin polarity indicator for a PCB? [duplicate]
I inserted a two-pin header (P1) into this circuit using EasyEDA. Does the square outline mean that is the positive pin, or is there another meaning?
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Data rate with modulation and conventional encoding
I had a rather simple question. Say I had a SISO communications system with an information data rate of 50 Mbps that uses QPSK modulation and a rate 1/2 conventional coding. What would be my symbol ...
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72 views
Is there a standardised noise source symbol for circuit diagrams?
Does anyone know of any standard symbol for a noise source, for example of one wants to represent the Johnson-Nyquist noise, what is best to use?
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2answers
153 views
What is the correct schematic symbol to use for virtual ground?
I'm following the design of a circuit requiring a power supply to provide something the author calls virtual ground, \$V_{gnd}\$. The circuit look like this:
However, I'm using KiCad for the design ...
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2answers
63 views
Cannot Identify Schematic Symbol
I am looking at a VGA to HDMI conversion circuit, and right near the HDMI connector is an array of these symbols:
By the values posted by these symbols, it looks like some sort of capacitor, but I ...
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1answer
493 views
What does this resistor symbol mean?
While repairing a Marantz amplifier using the service manual, I came across resistors with odd symbols (see page 18).
They are trapped between two parallel lines (for example, 3297).
Is this linked ...
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1answer
44 views
What's the circuit diagram symbol for a variable reluctance sensor transducer?
I know I've seen the symbol before, it's something like a circle with an open triangle facing in the direction of current flow with a line through the middle. I'm specifically thinking of the ...
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49 views
Addition to DC/AC converter symbol
This image is of a DC/AC converter (inverter), but with the addition of a "C S" block to the left. What is the meaning of this additional block?
The wire at 9 o'clock is from an AC supply. This is ...
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1answer
119 views
NTC PTC thermistor symbol
What is the reasoning behind the arrows on the circuit symbols of NTC (up and down arrow) and PTC (two up arrows)?
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52 views
Error: L6218E: Undefined symbol LCD_X_Config in Keil
I encountered a problem working with the EMWIN package in keil, this error message:
...
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3answers
137 views
Multiple different grounds in one diagram
Assume I have multiple electronic circuits and I need to display them working together. Each of them has a common ground symbol. However, the different grounds of the different circuits are not ...
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2answers
144 views
Is this symbol another version of a ferrite bead symbol?
I saw this symbol in the schematic of the ADPD2140z eval board. From what Ive seen online, ferrite bead symbols are usually slanted rectangles with right angled corners. This is slightly different, ...
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1answer
122 views
unknown circuit symbol rectangle with arrow
I've never seen this symbol before but my wiring diagram is full of it. I also have searched for lists of symbols but it isn't among them. Does anybody know what is is? It is from my wiring diagram of ...
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2answers
49 views
Altium pin parameters in symbols
thanks for the many great questions and answers over the years. This is my first question.
I use Altium Designer for capturing designs.
I had an idea to make my processor components a little more ...
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0answers
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Female symbol on PCB silkscreen?
You can see the symbol on the upper right hand side of the board, what appears to be a pictogram of a woman wearing a dress, similar to a bathroom sign (?)
Wondering what this is.
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3answers
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What are the use cases for a closed solder jumper on a PCB?
I've come across the the symbols for closed solder jumpers in design libraries, and now I came across one in a design. I get why you might include an open jumper that could be solder closed, but what ...
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1answer
76 views
what is the German/Austrian nomenclature(Voltage and current direction) in electronic circuit?
AS I came from a country where we use the french system in defining the voltage current arrows in electronic circuit, I am confused about the German/Austrian system where I see the voltage arrow is ...
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2answers
148 views
KiCAD symbol editor - how to use insert key to duplicate pins with every other number
I'm trying to make this header row in KiCAD. If I place pin 1, and press the insert key, it gets duplicated nicely. The problem is, that pin becomes pin 2, then the next pin 3. I want pin 1,3,5,7,9 ...
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2answers
323 views
Fusible resistor
I'm currently working on an assessment for the electronics part of my PEO and have to complete a resistor report, detailing different types of resistor and their circuit symbols.
I have managed to ...
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6answers
3k views
How can I tell if a MOSFET is enhancement-mode or depletion-mode?
Today, from ignorance I have fallen head-first into the world of MOSFET transistors. In my scramble to find some information on the MOSFET I will be using as a switch (HEXFET actually), I learned that ...
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1answer
74 views
What does this transformer symbol mean
In a balun I have, (model 50-7725 from CPC, datasheet -> http://www.farnell.com/datasheets/2365902.pdf?_ga=2.142463986.1590159842.1535980880-667311346.1535980880)
It shows the Balun as:
What is the ...
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1answer
807 views
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1answer
1k views
What is the meaning of the “lasso loop” on circuit diagram?
I've never seen this "loop" structure in a circuit diagram before.
Pin 6 has a line that loops around the lines from pins 5 and 9.
Pin 7 has a line that loops around all other lines, except the ?...
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1answer
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Symbols: Double-arrow circle enclosed “10” on electronic appliances
What does the symbol that says 10 inside the double arrowed circle mean? I have seen a similar symbol on another appliance that had the number 25
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45 views
Help with RGBS schematic
I am making up a cable for the below diagram, but am slightly confused about the shielding. Does this mean that the red (earth) should shield the yellow, white (earth) shield the orange, etc?
Does ...
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1answer
289 views
What does this symbol in a schematic diagram mean? (wire through circle)
I am looking at the data sheet for the iC-NZN N-type laser diode driver.
What does the marked symbol stand for?
It appears in a number of places, always marking IO pins.
My guess would have been ...
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1answer
215 views
Having Trouble Identifying Crystal Oscillator Symbol
I'm working on a circuit implementing the TI CC2640R2F (Datasheet) which requires an external 24MHz crystal oscillator to function. In the schematic (pg. 42), it shows what looks like a normal ...
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1answer
84 views
What does this “Not Installed” symbol mean on the data sheet?
I am designing a circuit that uses the TI TPS561201 buck converter. Reading the data sheet, I am slightly confused with the notation of "Not Installed" next to some of the components.
Questions:
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2answers
132 views
SENT protocol output unit is LSB. What does this mean?
I have read couple of datasheet of devices which uses SENT protocol. They define the output between 193 and 3896. The unit is LSB. I think that this does not mean least significant bit?
Example:
...
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1answer
475 views
Symbol for ideal voltage source vs symbol for real voltage source
Wikipedia's article on Voltage source shows the figure below. It says in the figure that the following symbols is an ideal voltage source.
However, elsewhere in the same article they have a circuit ...
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1answer
378 views
What is this triangle symbol representing?
I am getting started with electronics and decided to learn about the inner workings of the L293D. However, I found a symbol I don't recognize, which is the triangle with 3 connections. There are four ...
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2answers
217 views
What are these “X”s / crosses on this schematic's wiring? Traces attached to the metal housing (ground)?
Below is a section of the schematic for the RF modulator of a Nintendo NES-001 system. I am curious what these Xs are that I've boxed in red below. Looking at my own NES-001 and matching locations, I ...
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3answers
1k views
Where does this current source symbol come from?
There's an old symbol for a current source that's just two overlapping circles, reminiscent of a Venn diagram. There is more than one question on here with people asking what the symbol is, but I'm ...
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1answer
731 views
What do the letters W, Z and G stand for on an extension cord (USA)?
G seems to be obviously (G)round, but I have no idea which of the others is Neutral and which is Hot.
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1answer
238 views
Is there a switch that can replace Voltage Controlled Switches?
This is the voltage controlled switch in the LTspice.
Is there a switch which can replace it? I need a switch for a schematic. At first, I used a transmission gate switch, but the simulation of the ...
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1answer
87 views
Please, define symbols which are pointed
What do these symbols mean? Please, describe
It is a part of high voltage power supply
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3answers
403 views
Meaning of Ceramic Capacitor markings
I was inspecting a PCB with a magnifying glass and noticed some of the light brown ceramic smd capacitors have 3 digit markings on them. Is there a "standard" of what these markings stand for? The ...
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3answers
2k views
what does this symbol mean?(like a comparator,but there is another symbol in this triangle)
What does the symbol mean?what is this comparator difference?what is its function?can anyone introduce it to me?
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What does this key looking symbol (with 4 bars) indicate?
Im currently studying for my NEN3140 exam and I stumbeld acros this image:
I have been poking around in google (and all the symbol questions I could find here) and the closest I got is this (page2):
...
