Questions tagged [symbol]

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

1
vote
1answer
79 views

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 ...
0
votes
0answers
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 ...
7
votes
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 ...
2
votes
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 ...
0
votes
0answers
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 ...
0
votes
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 ...
0
votes
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.
0
votes
1answer
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 ...
3
votes
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 ...
8
votes
1answer
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. ...
8
votes
2answers
1k views

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?
0
votes
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?
0
votes
0answers
20 views

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 ...
1
vote
1answer
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?
2
votes
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 ...
1
vote
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 ...
8
votes
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 ...
3
votes
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 ...
0
votes
0answers
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 ...
0
votes
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)?
0
votes
0answers
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: ...
0
votes
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 ...
3
votes
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, ...
0
votes
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 ...
0
votes
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 ...
1
vote
0answers
98 views

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.
6
votes
3answers
1k views

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 ...
0
votes
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 ...
1
vote
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 ...
1
vote
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 ...
7
votes
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 ...
0
votes
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 ...
0
votes
1answer
807 views

What does the x mean on MCB?

Any clue? Or is it just there for better visual?
6
votes
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 ?...
11
votes
1answer
2k views

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
0
votes
0answers
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 ...
2
votes
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 ...
2
votes
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 ...
1
vote
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: ...
1
vote
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: ...
0
votes
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 ...
1
vote
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 ...
1
vote
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 ...
8
votes
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 ...
1
vote
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.
0
votes
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 ...
2
votes
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
0
votes
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 ...
9
votes
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?
1
vote
0answers
81 views

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): ...