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Questions tagged [symbol]

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

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14
votes
3answers
3k views

Strange symbol on PSU label

I have a PSU (wall wart) with a symbol on the label that I don't recognise. I'm curious as to what it means. It's probably some safety symbol of some form, but not one I have ever seen before. I'm ...
1
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1answer
107 views

Identifying a switch symbol

Is the following sign a switch and if so, what kind if switch is it exactly? It is used in the schematic of the ABB Eden (Adam & Eva) Module.
17
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1answer
2k views

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. ...
4
votes
3answers
2k views

Meaning of small circles and sharps (#) in pinout diagram?

I'm trying to re-plumb a nice proprietary case for continued use with arbitrary motherboards. But I've no clear idea what the meaning of the small circles (shown in red, here) at the juncture of the ...
3
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2answers
493 views

Help Identifying Vintage Capacitor Symbol

I am trying to understand a vintage circuit diagram (70s) and came across this symbol of a capacitor with an arrow. Is this a bi-polar capacitor? Why show an arrow?
2
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2answers
2k views

What is the difference between those 2 logic gates symbols [duplicate]

I was wondering the difference between two symbols (we can found the diagram page 2 at http://www.onsemi.com/pub_link/Collateral/MC14040B-D.PDF ) Between the logic gate NOT (a triangle then a circle) ...
4
votes
2answers
7k views

Different Zener Diode Symbols

In the past I have seen two different symbols for a zener diode. One shows the complete "Z" shape on the cathode, and one shows more of an "L" shape on the cathode (see images below): What is the ...
4
votes
1answer
194 views

Is there any characteristics difference indicated by this two symbols ? [duplicate]

During study , I am encountered with this two Inverter symbols . Sometimes this two symbols are usedn in same logic circuit. Though they are working as inverter, I'm guessing there must be some ...
0
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1answer
171 views

Which symbol to use in my schematic for a supply signal which is also an output?

The following diagram shows a voltage regulator that gets two inputs (+-24V) and generates two outputs (+-15V). For this reason, I am representing the 15V signals as outputs, but I don't know if this ...
0
votes
1answer
425 views

Identifying diode like symbol with two lines going into the “triangle”, used in a H-bridge [closed]

I have a question about a special circuit symbol: The component is a switch of a H-bridge. I checked a few symbol lists like here or here - but I can't find the right component. What is the meaning / ...
5
votes
2answers
574 views

What is the meaning / significance of this Capacitor Symbol? [duplicate]

In the SanKen data sheet for an Off-Line PWM Controller (found here) they use, in several places, a schematic symbol for an electrolytic capacitor that I haven't seen before (see C6 in the image below)...
2
votes
1answer
4k views

Polarity symbols on universal AC-DC adaptor

I have a universal AC-DC adaptor that has the following symbol by the polarity switch: Is it safe to assume that the top part of the diagram indicates the polarity of the inner surface of the ...
10
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4answers
9k views

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 ...
3
votes
1answer
149 views

Altium - line spacing between the parameters in the schematic symbol

Does anybody know how to change the line spacing between the parameters in the schematic symbol without disabling the autoposition feature in Altium Designer? If I change the font (smaller) of the ...
0
votes
1answer
86 views

What is this symbol with designator T ? Looks like two pads pressed really close together

Are T1 and T2 relays? This picture is grabbed from the datasheet of this component (high current power switch) http://www.infineon.com/dgdl/Infineon-BTS555-DS-v01_00-en.pdf?fileId=...
2
votes
1answer
328 views

Typography of Letters in Circuit Symbols

How should the letters in circuit symbols look like / be typeset, especially the symbols for voltmeter, ampmeter, generator and motor? Should the V, A, G and M be typeset in the surrounding font (...
1
vote
2answers
979 views

What do the numbers mean on a three-position switch?

I'm having trouble understanding how this instrument switch works. Here is the schematic illustrating the three switch states: How do I interpret these numbers? If I were to guess, I'd ...
1
vote
1answer
430 views

Diagram symbol for an inductance with a neodymium magnet as a core

I want to know if there is such a symbol (i.e. an electrical diagram symbol for an inductance with a magnet as a core). If such is the case how is it specified the orientation of the poles of the ...
4
votes
1answer
692 views

What does the wishbone symbol mean?

I'm looking at a schematic where various wires connect to blocks. Sometimes the blocks have a wishbone symbol with a number next to it. Other times, it's a wishbone symbol without a number. I've ...
4
votes
1answer
187 views

What do the shades on the IC's edge mean?

I am trying to get into a bunch of stuff by taking on a large project. I want to create my own FPGA board, for which I am trying to understand the schematics of an available board (In this case a Cmod ...
4
votes
1answer
1k views

What does the red symbol mean here?

I found this symbol on the schematics of an FPGA board. AIN stand for Analog input.
2
votes
3answers
5k views

Unknown symbol on schematic (Circle with “M” underlined)

I have a symbol on my schematic but I cannot figure out what is this? I looked through Internet and didn't find anything( Is this a microphone? If so give me some helpful links to learn something ...
0
votes
1answer
584 views

How to create a symbol in EAGLE that consists of multiple other symbols?

I'm trying to create a symbol that consists of multiple other symbols. I'd like it to look similar to what's in this datasheet. I have found out how to create the part itself, but i'm not sure if I ...
0
votes
1answer
293 views

What does a dashed resistor symbol mean?

What is the dashed resistor symbol going to the ground shown in the picture? Thank you.
4
votes
1answer
1k views

What is this electronic symbol?

I am trying to repurpose a scavenged motor, however the wiring diagram that's on it has a schematic symbol I have never seen and could not find on the Internet. Anyone know what this is and what it ...
6
votes
1answer
471 views

Help identifying resistor with arrow accross and capacitor with unit “kp” or “k” or value “5/6”

Can you please help me identity these symbols from a vintage (1960) diagram? The capacitors units are noted with "KP", sometimes just "K". What is the rectangle crossed with an arrow? It looks like a ...
2
votes
2answers
451 views

Can I have two (or more) different symbols for the same LTspice schematic? How?

I have two components in my top-level schematic and noticed that the schematics of these components are actually the same. To avoid any duplication of changes done to these subcircuits, it would be ...
4
votes
2answers
2k views

Which symbol to use for polarized capacitor?

Ok guys, this has been driving me crazy and I would love an absolute universal answer (even though I know there are disputes)... Which symbol should I use for a polarized capacitor? At school they ...
3
votes
4answers
2k views

Diamond symbol in schematic

I am having a lot of Diamond symbols in my schematic named as Pxxxx. I am not able to find what it means as there are no legends mentioned in the file. Also, are there any general conventions that ...
0
votes
1answer
308 views

LTspice Transient Simulation with external components

My problem is that I want to simulate a circuit with a transient analysis but as soon as I hit the simulate button, the simulation runs and runs and runs and won't terminate (although my stop-time is ...
0
votes
2answers
289 views

Unknown schematic symbol help

What do the symbols for components L1 (FB) and MV1 mean in the schematics below? What does MV and FB mean?
3
votes
2answers
525 views

What's this symbol mean?

I know its probably been answered before, but I'm not really sure what to google to find the answer.
24
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5answers
23k views

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?
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1answer
974 views

schematic symbol from power supply, two triangles pointing together

What does the symbol marked Z1 (two triangles pointing towards line) represent in this schematic?: This is coming from the reference design on page 10 of the LD7550-B pulse width modulator datasheet (...
1
vote
1answer
525 views

What is this symbol, and it belong to which-system or convensions?

This is a very common- symbol used in school-textbooks as a symbol for antenna. This website (http://www.chegg.com/homework-help/questions-and-answers/figure-shows-arrangement-generating-traveling-...
0
votes
1answer
502 views

Meaning of micro-sd card symbols

I hope this is the right stackexchange site to ask this question. I'd like to now the meaning of these symbols, visible in the front of two different micro sd cards of the same model: Backgroung (in ...
22
votes
1answer
4k views

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 ...
4
votes
7answers
13k views

How to memorize a diode's polarity in symbol? (self-answered)

How to memorize a diode's polarity, such as anode and cathode in symbol?
6
votes
2answers
1k views

Is there any generalized symbol for an electrolytic or electroplating cell?

Is there any symbol for an electrolytic cell? An electroplating cell, for instance? (There are commonly used symbol for electrochemical cell (battery symbol). But symbol for electrolytic cell not ...
0
votes
1answer
655 views

Is There a Symbol for an Inrush Current Limiter?

Is there a schematic symbol for an inrush current limiter, or is a resistor used instead?
5
votes
5answers
1k views

Is there any symbol for electrical insulation?

Is there any symbol for electrical insulation? Is there any symbol for insulated wire? is there any symbol for non-insulated wire?
2
votes
4answers
228 views

Where do these grounding wires go? [duplicate]

In the following schematic the two Vss pins where are supposed to be the grounding pins don't connect to anything. Does this mean that the circuit is self-grounding (if that's even a thing)? I'm ...
-3
votes
3answers
683 views

What does this symbol refer to?

What is the symbol that is below the C1 capacitor and R1 resistor. Is it the symbol of grounding?
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3answers
404 views

It is possible to exist more than 1 color code for same resistance. Can i use all of these color-codes?

It is possible to exist more than 1 color code for same resistance-value. I doubt, is there any convention about use only one of them (while manufacture) . Example : Say an 1 ohm resistor could be ...
1
vote
2answers
823 views

Is there any symbol for Alternate action switch?

There are some switches, that looks like push-button switches, but acts like On-Off switches (i.e. can maintain contact). In one-press they turns-on (and looks slightly deeper), and in next-press, ...
10
votes
2answers
4k views

What does this wiring schematic symbol mean?

I ran into this wiring symbol today and haven't been able to find out what it means. Somehow internet search of "criss-cross wire schematic symbol" wasn't especially fruitful. Is this something I ...
3
votes
2answers
233 views

What is this symbol?

I am in first year of Engineering school and I was given an assignment which contains this circuit which drives pressure sensors in a pitot tube : For training, I am trying to reproduce it using the ...
1
vote
4answers
415 views

Is there a special symbol for instrumentation amplifier, to distinguish it from an opamp?

Is there a special symbol for instrumentation amplifier, to distinguish it from an opamp? If I use the opamp symbol in a circuit diagram, it looks wrong, like it's missing components:
-3
votes
1answer
245 views

Circuit symbol for spectrum analyzer

Does anybody know what the circuit symbol for spectrum analyzer is? My internet searches for it haven't turned up anything so far. Most of the searches ended up showing the internal circuit diagram ...
4
votes
5answers
25k views

Is there a potentiometer model for LTspice?

I started designing a model for a three-terminal potentiometer in LTspice, since none are included and it's such a common component. Drawing the .asy symbol and the wiper terminal, it dawned on me ...