Questions tagged [drawing]
The drawing tag has no usage guidance.
47
questions
3
votes
1answer
196 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: ...
1
vote
1answer
115 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 ...
0
votes
2answers
149 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 ...
0
votes
1answer
47 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 ...
20
votes
2answers
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 ...
1
vote
1answer
59 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 ...
12
votes
7answers
2k 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 ...
0
votes
2answers
103 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/...
0
votes
1answer
305 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 ...
3
votes
3answers
875 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 ...
0
votes
2answers
79 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 ...
2
votes
2answers
210 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 ...
5
votes
3answers
6k 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 ...
16
votes
7answers
6k views
Is it possible to draw circuits through code?
Is there a better way not by writing netlist files. something like:
...
0
votes
0answers
211 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?
0
votes
1answer
33 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 ...
0
votes
2answers
802 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):
...
3
votes
2answers
6k 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 ...
0
votes
2answers
160 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 ...
0
votes
1answer
97 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 ...
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 ...
1
vote
0answers
230 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 ...
1
vote
1answer
459 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 ...
2
votes
2answers
4k 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
12
votes
3answers
5k 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 ...
2
votes
1answer
92 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 ...
2
votes
2answers
428 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 ...
1
vote
2answers
688 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 ...
1
vote
2answers
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 ...
1
vote
2answers
595 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 ...
2
votes
1answer
921 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?
0
votes
1answer
576 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} + ((!...
3
votes
2answers
903 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 ...
3
votes
1answer
131 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'...
0
votes
3answers
16k 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 ...
1
vote
0answers
117 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.
4
votes
3answers
898 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 ...
-2
votes
1answer
246 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 ...
1
vote
1answer
625 views
Any idea which software was used to generate these circuit diagrams?
And/or:
I'm trying to choose a free schematic drawing software, and like the way these two look. I've read related questions about circuit drawing software as well. I like Fritzing, but it lacks some ...
8
votes
5answers
776 views
What do you call the drawing which contains tracks, pads and drilling points of a PCB layer/side?
Example:
Does this drawing has a technical name?
I see that people usually call these drawings "PCB". But, PCB is physical object, physical implementation of circuit, isn't it? Is these kind of ...
30
votes
3answers
13k views
Anyone knows what software tool is used to draw these circuit schematics
I was reading online and found this site: http://www.cppsim.com/
I was very curious how this professor drew all these circuit diagrams in his lecture notes (such as this one: http://www.cppsim.com/...
12
votes
3answers
6k views
Software for creating cable schematics
I'm looking for free software to create drawings of communication cables eg. DE-9, RJ-45, Ribbon Cables, and Molex. I can't seem to find any software that comes with images of the connectors that can ...
279
votes
7answers
120k views
Rules and guidelines for drawing good schematics
There are a lot of poorly drawn schematics here. A few times people have actually asked for critiques of their schematics. This question is intended as a single repository on schematic drawing rules ...
2
votes
2answers
150 views
How do I read this drawing?
This is from the mechanical drawing for the XSON6 package in this datasheet (page 13).
What do the gray rectangles represent? Note that they don't have any measurements.
6
votes
2answers
877 views
Understanding a mechanical drawing
I'm trying to understand this mechanical drawing. (Another one. I asked a question about mechanical drawings a while back.)
I can work out most of the dimensions, but the mount pads are confusing me. ...
3
votes
4answers
656 views
Help me decode this mechanical drawing of an SD card PCB layout
I'm trying to understand this mechanical drawing so I can create a layout for it in gEDA PCB.
Specifically on page 4. I've already managed to place GND 1 and GND 2; those were fairly simple to work ...
33
votes
13answers
17k views
Software to create timing diagrams
In my professional life, I sometimes need to create timing diagrams for protocols: UART, SPI, etc. However, I can't find any good programs available. What programs can be recommended for this and what ...
