Questions tagged [drawing]

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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 ...
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3 answers
43 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 ...
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1 vote
1 answer
201 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 ...
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-2 votes
3 answers
148 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 ...
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6 votes
3 answers
320 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 ...
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1 vote
0 answers
58 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 ...
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-1 votes
1 answer
36 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 ...
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0 answers
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How to redraw net lines straight in gschem?

I drew two components, connected them into circuit, moved them a bit and got this How to make net lines straigt now? I can't find automatic way to do this. And even I can't move nodes or segments ...
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1 vote
1 answer
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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 ...
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0 votes
1 answer
138 views

Finding the magnitude of the Transfer Function

This is the circuit, where some of the components values where given and the others, I found myself. (Sorry I have no link to the design, I needed membership there) The following part says to draw ...
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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 ...
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1 vote
1 answer
117 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 ...
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3 votes
1 answer
372 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: ...
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2 votes
1 answer
233 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 ...
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2 answers
1k 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 ...
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0 votes
1 answer
64 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 ...
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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 ...
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1 vote
1 answer
165 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 ...
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12 votes
7 answers
3k 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 ...
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1 vote
2 answers
140 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/...
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0 votes
1 answer
472 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 ...
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3 votes
3 answers
3k 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 ...
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0 votes
2 answers
100 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 ...
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3 votes
2 answers
934 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 ...
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6 votes
4 answers
11k 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 ...
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19 votes
8 answers
7k views

Is it possible to draw circuits through code?

Is there a better way not by writing netlist files. something like: ...
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0 votes
0 answers
326 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?
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0 votes
1 answer
45 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 ...
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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): ...
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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 ...
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0 votes
2 answers
173 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 ...
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0 votes
1 answer
128 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 ...
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4 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 ...
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1 vote
0 answers
274 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 ...
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1 vote
1 answer
1k 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 ...
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2 votes
2 answers
8k 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
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13 votes
3 answers
8k 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 ...
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2 votes
1 answer
99 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 ...
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2 votes
2 answers
597 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 ...
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1 vote
2 answers
738 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 ...
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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 ...
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1 vote
2 answers
897 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 ...
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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?
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0 votes
1 answer
907 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} + ((!...
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3 votes
2 answers
1k views

XCircuit Working In LaTeX Mode

I'm trying to get LaTeX mode to work in XCircuit. It really doesn't seem to produce a tex file when I save. Here are the steps I'm following. Open terminal in Linux, execute xcircuit, program ...
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3 votes
1 answer
206 views

What is the pin diameter for this part?

What is the required pad diameter for the following part ? HM2J07PE5118N9LF Maybe its late and I'm just not seeing ? The recommended PCB hole layout usually contains this information but I just don'...
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1 vote
3 answers
22k views

How to draw a circuit diagram to check a 4 bits number is odd or even

Like the title, anyone know how to draw a circuit diagram to check a 4 bits number odd or even ?? Update: Here are my truth table for my solution: A B C D Output 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 0 0 ...
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1 vote
0 answers
122 views

What software do people use to make digital circuit schematics? [duplicate]

What software do people use to make electronic circuit schematics like this or similar.I tried using multisim but it seems to miss most chips.
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4 votes
3 answers
1k views

Documenting Digital Design - Schematics and Figures

I'm working on a small digital design using a Xilinx picoblaze softcore processor, and I'm finding that producing schematics of acceptable quality to be frustrating and time consuming. I've attempted ...
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-2 votes
1 answer
266 views

free drawing on a touch screen, interacting with physical objects [closed]

I am an hobbyist and having a plan to create my own drawing tablet, and still making ideas, I want to combine physical world with this thing, an idea that I have is that I want line that I draw with ...
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