Questions tagged [drawing]

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Will someone judge my circuit schematic?

I've got an interview for my first job out of university coming up, and I'm preparing a presentation on a project I did a while ago. I'm currently translating my hand-drawn schematic to a computer-...
ahzired's user avatar
  • 25
0 votes
0 answers
39 views

Electrical diagram for a single phase switch, two way switch and ESTOP

I have a need to do an electrical diagram with the following components: Single phase motor (GGM the motor is 110V, single phase, 60Hz K91P60FU-T5.) It has five leads according to the data sheet. ...
CuriousRover's user avatar
1 vote
1 answer
90 views

Electrical Drawing Question

I was looking at the electrical drawing above - for US commercial construction. Could you please explain what the following lines mean? 4#250, 1#4 GRD. 2-1/2" C or 3-#8 +10 GRD in 3/4" C
Jafar's user avatar
  • 13
7 votes
2 answers
1k views

What is the circuit symbol for a triple gang potentiometer?

What is the circuit symbol for a triple gang potentiometer? I've found one possibility for dual gang potentiometers: (Image source: Components101 - Different Types Of Potentiometers And How To Use ...
iwantmyphd's user avatar
4 votes
1 answer
2k views

A "B" inside a triangle symbol in connector drawing datasheet

I was checking a drawing datasheet, and I noticed this symbol. A B inside a triangle. As seen on the screenshot, the symbol is on the side of the table that indicates the pinout. I can't find out ...
NicoCaldo's user avatar
  • 305
4 votes
2 answers
610 views

How to read "golden fingers" on drawing?

Can you please help me getting width of theese golden fingers and what those text in red rectangle means? It is M.2 connector with E key.
filimonic's user avatar
  • 149
1 vote
2 answers
156 views

What is the electrical circuit symbol for an "AC ground lifter" or "cheater plug"?

This is also known as a "three-prong/two-prong adapter." What is the electrical circuit symbol for this item? Here is an example: EDIT: To be clear, I am not using, nor endorsing the use ...
iwantmyphd's user avatar
2 votes
2 answers
94 views

Designation "2-" in a technical drawing of a component

What does the encircled "2-" designate in the technical drawing below? Is it some standardized/common designation of something? "R" stands for the radius, and the numbers refers to ...
Horror Vacui's user avatar
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0 votes
3 answers
48 views

Does the length of a pad's edge include the radius?

I'm making a footprint for a part, and I'm unsure how the length of an edge is defined. I've circled in red the two dimensions that are confusing me. For example, does the 0.1 indicate the length of ...
sgdsgyhetwaraw's user avatar
1 vote
1 answer
2k views

Safe Continuous Discharge Rate of a Car Battery

I have a car battery (Varta Silver Line of Products) that's rated at 110Ah, and 900A Cold Cranking Amps. The marketing of the battery from different sources says "huge reserve capacity" but ...
Hans's user avatar
  • 145
-2 votes
3 answers
267 views

What software has been used to make this circuit diagram [closed]

I am new to EDA tools, I use xcircuit to draw circuits but that is very time consuming. I see these diagram a lot on internet with green wires and blue labels that look nicer than xcircuit: What EDA ...
Kutsit's user avatar
  • 261
9 votes
4 answers
641 views

Where do you find dimensions for drafting symbols to their standard?

Where do I find the official dimensions to draft electrical symbols according to their standard? So far, I've referred to ANSI/ISA-5.1-2009 to draw instrumentation symbols. In it, there is a section ...
Justin St-Amant's user avatar
1 vote
0 answers
154 views

What is the proper reference designator for a ring terminal in a cable drawing?

I am working on some cable drawings that utilizes ring terminals that connect on a relay terminal. Initially, I was using T as the reference designator for them, but I realized that is incorrect since ...
user3171804's user avatar
-1 votes
1 answer
52 views

Three different dimensions shown in package drawing, what do they mean?

I have an IC that uses this package from analog devices: https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp_8_5.pdf. Most of the dimensions are shown in three numbers: I ...
AnB's user avatar
  • 27
1 vote
1 answer
93 views

What does a table under "Emission Point" label mean in metal-can laser LED mean?

Screenshot above comes from page 6 of this datasheet That's for OSRAM PLPT5 450KA blue laser diode. So far I did not have any problems understanding technical drawings, so I suspect this may be a ...
quetzalcoatl's user avatar
0 votes
1 answer
260 views

Finding the magnitude of the transfer function

This is the circuit, where some of the components values where given; the others I found myself. (Sorry I have no link to the design, I needed membership there) The following part says to draw the ...
E199504's user avatar
  • 227
3 votes
5 answers
1k views

How should chips with pins on bottom be drawn?

When you are drawing a schematic for an IC, and there are pins in the bottom center (in my case I am drawing for the BGM13S32F512GA-V2R), how should they be drawn? I have looked into some beginner ...
cproo12's user avatar
  • 45
2 votes
1 answer
131 views

How do I Avoid Very Long Horizontal Signal Path "Snakes" in a Schematic?

I'm drawing a schematic for my DIY project, a RF mixer, it has a local oscillator followed by a bandpass filter, a voltage divider, eventually the signal is fed into a mixer. Unfortunately, even ...
比尔盖子's user avatar
  • 6,409
3 votes
1 answer
608 views

What does the minus sign mean in measurements in datasheet footprint drawings?

I have seen this more than once where there is a measurement such as "4-0.7". In this context, it clearly does not mean 4 to 0.7 mm so what does it mean. See the attached picture: Link to datasheet: ...
Emil Eriksson's user avatar
2 votes
1 answer
280 views

How do I read the dimensions to create a PCB footprint?

I'm trying to make a PCB footprint for the SSD1306 ribbon strip, and am unsure of the correct dimensions for the solder pads. The horizontal dimensions are clear enough but I don't know where the pads ...
Tanenthor's user avatar
  • 260
0 votes
2 answers
2k views

Butt splice electrical symbol

I'm making a detailed electrical diagram which needs to include splices. From researching on Google I couldn't find the conventional symbol for a butt splice, or even a splice, in an electrical ...
user211492's user avatar
0 votes
1 answer
66 views

How does a circuit regulate current in response to a lower voltage?

Brief background, I studied physics in college and am learning EE on-the-job through Art of Electronics and this wonderful website. So this is a follow up to a previous question I submitted here ...
lbman's user avatar
  • 23
20 votes
2 answers
5k views

Is it ok to 'snake' the flow of my schematic?

I recently watched this video by EEVblog on drawing schematics. One thing he talked extensively about was that the logical flow of a schematic should flow from left to right. Whilst this makes perfect ...
user avatar
1 vote
1 answer
191 views

Meaning of a potentional tolerance value for a dimension in a mechanical drawing

The mechanical drawing below contains two dimensions (2-Ø2.30 and 4-Ø0.92) that I can't make heads or tails of. I have spent quite a while researching mechanical dimensional and tolerance conventions ...
Benedikt M.'s user avatar
12 votes
7 answers
4k views

How do devices/appliances draw more current when needed?

Suppose I have a desktop computer and I decide to do something that requires more processing power. In this case my computer will draw more current to increase power. How is this increase in current ...
rr1303's user avatar
  • 439
1 vote
2 answers
185 views

Which tool is being used to create the following figure?

I am trying to determine the circuit drawing tool that is used to create figures in some papers I come across every once in a while. The tool is able to create some very slick-looking diagrams/...
Mad Jack's user avatar
  • 168
0 votes
1 answer
503 views

Schematic Symbol Help Possible Antiquated JFET Symbol Conversion

This is an old schematic, and the MPF102 JFET in the picture is confusing me. Can someone help me identify the Gate, Source, & Drain connections to this symbol, please! My guess is that the ...
user4467707's user avatar
3 votes
3 answers
4k views

What is "folded SMA" package of SMD?

There are three types of package in specification: SMA, Folded SMA and Clip SMA. The link for datasheet: SK32A What is the differences between them ??? I suspect, that Folded SMA it is SMAF, but I ...
KMM's user avatar
  • 419
0 votes
2 answers
112 views

Drawing TL094 Quad Comparator in Schematic

Quick question on drawing schematics, when you are drawing a quad comparator into a schematic (such as the TL094), do you use the comparator symbol four times with the IC label by it or do you use the ...
BowesAndArrows's user avatar
3 votes
2 answers
1k views

How and when should I split a schematic component into multiple parts

Using Altium, one has the option to split schematic components into multiple parts. The examples given within the Altium documentation split chips with multiple discrete components in them, but I have ...
Chuck990's user avatar
  • 113
7 votes
4 answers
12k views

Altium Keep-Out Layer Locked

When I try to draw a line in the Keep-Out Layer in Altium by clicking the tab for the Keep-Out Layer and placing a line, the layer suddenly changes to a different one and prevents me from adding to ...
Billy Kalfus's user avatar
  • 1,021
19 votes
8 answers
9k views

Is it possible to draw circuits through code?

Is there a better way not by writing netlist files. something like: ...
user37421's user avatar
  • 293
0 votes
0 answers
412 views

Microelectronic Circuits Sedra Smith (drawing tool)

I'm looking for the tool used in the reference "Microelectronic Circuits" (or similar) to draw the circuits. e.g. For the n-channel enhancement-type (circuit symbol c). Any help?
Abdulkader's user avatar
0 votes
1 answer
55 views

Override xcircuit's button bindings

I'm using XCircuit on my laptop running Ubuntu. Since getting middle mouse button action using touchpad is not easy I want to configure xcircuit configuration file. But due to lack of examples I'm ...
Vedanshu's user avatar
  • 300
0 votes
2 answers
1k views

Set up "bluetooth hc-06" on pcb

My teacher gave me a task to design a circuit board in P-CAD 2006. There is HC-06 Bluetooth module on the board. Unfortunately it has no usual smd or dip pins. Instead it looks like this (red arrow): ...
Luchnik's user avatar
  • 131
4 votes
2 answers
12k views

How could a solar panel drain my battery? [closed]

This question is in regards to a 100 Watt solar panel that is less than a year old. The solar panel was working fine but recently something happened. Now when I hook the solar panel up to my ...
Christopher H's user avatar
0 votes
2 answers
179 views

Drawing a electrical component [closed]

I would like to know, how could I draw a component picture like datasheet? I have attached one picture also. I want to draw the same component as the attached picture. Should I use Autocad electrical ...
J bd's user avatar
  • 13
0 votes
1 answer
149 views

Connecting arduino to existing pcb power grid

I have an idea about a project to control a device with the help of Arduino+wifi shield and an android app. The device that is to be controlled, already has its own power supply. Internally it ...
shant's user avatar
  • 1
5 votes
2 answers
3k 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 ...
Hreggviður Emil Eðvarðsson's user avatar
1 vote
0 answers
282 views

Is this a 'proper' way to represent a circuit schematic? [duplicate]

Is this a reasonable way to do a wiring diagramme. What are the common practices when making this sort of thing? Basically I am a compleat beginner and would love to know if this is a proper neat way ...
DobbyIsDead's user avatar
1 vote
1 answer
2k views

SOIC‑14 package dimensions confusion

I looked at the dimensions drawing of the SOIC‑14 package from texas instruments. But I am a bit confused about the way texas instruments marked some lengths. Why there are two values seperated by a ...
Michael's user avatar
  • 285
2 votes
2 answers
10k views

What does 'PLS' acronym mean on this CAD drawing?

I was making some EAGLE parts and was curious about the highlighted acronym shown in the image below: What does it refer to? Full Datasheet
KnightsValour's user avatar
14 votes
3 answers
10k views

V/I uppercase/lowercase convention?

Is there any standard in industry for using uppercase or lowercase for V and I in circuit diagrams? I ask this because my book seems to switch back and forth between the two without any rhyme or ...
Austin's user avatar
  • 315
2 votes
1 answer
103 views

Is there a convention for lines separating areas in circuit diagrams?

I often see boxes of various styles to separate areas and increase clarity in circuit diagrams. I'm wondering if there is a line style convention in circuit diagrams for illustrating: A set of parts ...
MikeFoxtrot's user avatar
2 votes
2 answers
683 views

What do these numbers on a package drawing mean?

I saw this on a package drawing in a BC847 datasheet: What do the numbers mean? They look like a date, but the SOT883 package is much more recent than 2003. (By the way, the numbers on the drawings ...
Joris Groosman's user avatar
1 vote
2 answers
756 views

Draw circuit diagrams with custom shapes? [duplicate]

I want all the benefits of dedicated schematic drawing software but I often don't like the way the diagrams actually look. I know it sounds trivial, but I find it easier to read nicely hand drawn ...
blarg's user avatar
  • 453
1 vote
2 answers
1k views

How to complete circuit diagram?

I have limited knowledge on electrics and wanted to ask how I can complete this circuit, how would I go about wiring it up? Bulb should ONLY be ON when Input A is ON and Input B is OFF. Bulb should ...
Karim Ali's user avatar
1 vote
2 answers
999 views

Need help to understand mechanical drawing for footprint

I am a new user of Altium Designer. I need to make a footprint of this varistor, and I cannot understand its drawing. Same thing happens for the rest of the components. Can someone here tell me how I ...
alexhilton's user avatar
2 votes
1 answer
1k views

What is the use of civil drawing for an electrical engineer? [closed]

I'm reading for a BSc in electrical engineering. In this subject, I've found a subject named civil drawing. Why do electrical engineers need to understand civil drawings?
opu 웃's user avatar
  • 161
0 votes
1 answer
1k views

Drawing circuit to compute mux

Ok so I've been working on this problem for a while now. I've been given mux(\$p_{11}, p_{10}, p_{01}, p_{00}, x_1, x_0) = p_{x_1x_0}.\$ I found the boolean formula to be: \$(!(x_1x_0))p_{11} + ((!...
user98289's user avatar