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Questions tagged [dimensions]

The tag has no usage guidance.

0
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2answers
82 views

Is miniaturization of office device A/C adapters feasible?

Today I looked upon my desk: as you can see in the screenshot below, there are three plastic boxes containing A/C adapters for (I think all in the 12-20V and 1-2A range): screen device notebook ...
0
votes
1answer
30 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 ...
0
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1answer
62 views

Intel max 10 dimensions - datasheet & BSDL mismatch

TL;DR: The BSD file from Intel doesn't match the datasheet. What are the right dimensions? BSD: https://www.intel.com/content/dam/altera-www/global/en_US/others/support/devices/bsdl/10M02SCM153.bsd ...
2
votes
2answers
55 views

Datasheet part dimensions [duplicate]

I'm trying to draw up a part in EAGLE, but am having a hard time making out the datasheet dimensions: For example, with the pin width, it's not clear whether it's 0.51 (mm, I presume) or 0.31. ...
0
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1answer
63 views

sizing voltage regulator [closed]

I am to size a 3v3 voltage regulator, It gets at its input 12VDC maximum. And the load can consume up to 150 mA (few leds, 20 NMOS control, ADC control, microntroler supply...) and ambient ...
0
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1answer
136 views

SD Card pins dimensions

I am trying to create an SD card from a PCB. My problem is that I cannot find the SD card specification that would give the: Dimensions of each Pin Placement of each Pin All specifications I could ...
-7
votes
2answers
75 views

ATmega168 Dimensions

Anyone has the dimensions of the ATmega168? The on-board one, not the through-hole one. I need it, and after searching in the datasheet, I couldn't find it.
3
votes
3answers
422 views

Reading dimensions for datasheet

I have the following PCB datasheet, but I am very uncertain as to what it is saying. Some of the dimensions each have 3 numbers, which I took as nominal, minimum and maximum values, however, the sides ...
0
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1answer
105 views

whats is the difference in these dimensions

I am wondering what's the difference in these both highlighted dimensions.
0
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1answer
27 views

What is the measurement grid in the context of strain gauge?

The sensor I am investigating is the 1-LM11 by Omega. I am looking at the specification at there are two metrics which confuse me, the measurement grid A is 1.5mm while measurement grid B is 2.5mm. ...
0
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2answers
93 views

Datasheet unclear on the dimensions of the 16 pin SMD part

I am planning on using a quad optocoupler IC named ISQ203XSM (http://www.farnell.com/datasheets/90948.pdf?_ga=1.159355187.80908598.1463646290) and am confused regarding the dimensions of the SMD ...
0
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3answers
560 views

Altium Panelizing

I want to send my board to production however i am not sure a component's actual sizes because there is not enough information on its datasheet. I put its image and the necessary dimension "x". This ...
-4
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2answers
137 views

I need help with designing my first PCB on Proteus?

I've placed the component of a simple power supply circuit on PCB layout screen using auto-placer and auto-router. I would like to know many things about dimensions: Is there a standard space ...
1
vote
1answer
81 views

what does this number(spacing between pads) in the datasheet mean?

i am going to design footprint for a devise and i need to know spacing between pads. do you know what does (2-1.27) mean? the devise is pico oem socket. thanks
0
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1answer
404 views

Altium PCB dimensions

I am looking for a way to automatically update the PCB dimensions in my PCB documentation. I have the X & Y dimensions listed in the title block as PCB strings. They are currently set as project ...
-1
votes
1answer
116 views

US Non-Polarized Plug Dimensions [duplicate]

for academic purposes I'm doing a very specific task where i need to calculate the Cell Constant of an American Non-Polarized Plug, ie, without same length the prongs. So I need to know what are ...
1
vote
1answer
311 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 ...
0
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2answers
134 views

Confusion on dimensioning power supply and fuse for a motor

I have the servo-motor model called MAC140. Here is a long manual including all other types of motors of the same company: http://www.jvl.dk/files/pdf-1/user%20manuals/lb0047gb.pdf If I go to section ...
1
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2answers
1k views

5-pin DIN socket advertised as MIDI, not the same as on my MIDI gear

I bought a 180-degree 5-pin DIN chassis-mount socket dirt-cheap for a project, but I saw that it looks quite different from the MIDI outs on my MIDI gear; I did some research but couldn't find any ...
1
vote
1answer
115 views

How high is the TLC5940?

I've got some TLC5940 PDIP package ICs coming in the mail in a couple weeks or so, and in the meantime I'm designing a couple boards for them. I'm trying to figure out if the TLC is short enough ...
6
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4answers
1k views

What does “V.A.” mean in datasheet dimensions?

I'm looking at a datasheet for an LCD panel (pdf link to datasheet). I don't understand these two encircled dimensions: What does the acronym "V.A." mean for these dimensions? I have referenced a ...
6
votes
6answers
3k views

Reading dimension in datasheet

This is my first time making pcb layout. I am also quite unfamiliar with datasheets. I am using DS90LV019 (the figure is attached below). What is the actual length of this IC. Does (0.335-0.344)/(8....
4
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1answer
4k views

Through-hole footprints: pad size from technical drawings

I'm creating some footprints for through-hole components in KiCad, and I've got some issues determining the correct pad dimensions from manufacturer's technical drawings. As an example, here's the ...
1
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1answer
832 views

Electronic symbols standard sizes

I started to make my own eagle library with all basic parts like resistors, capacitors, inductors and so on... I know there is a standard for electronic symbols but I couldn't find the dimensions of ...
3
votes
1answer
1k views

Why do they put some optocouplers in 6-pin packages?

Example: It is obvious that an optocoupler which provides a pin for the base of the internal transistor (e.g.; PS2621) cannot be in a 4-pin device. My question is not about this kind of optocouplers. ...
4
votes
2answers
574 views

Missing footprint dimensions in Datasheet

I am preparing to start work on designing a board that uses a component in a PowerFLAT 5x6 package (the component is a power Schottky rectifier, part STPS30M100DJF from STMicroelectronics). The ...
1
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1answer
180 views

Abstract Datasheet Dimension Notation

I am attempting to create a footprint for a Surface Mount Component and I am using the manufacturer's datasheet for reference. They include PCB dimensions but the notation used is a bit confusing. It ...
3
votes
1answer
175 views

pick and place cannot read LCC module

The assembly house has a P&P machine (Yamaha i-pulse M4S) and the export file is from Altium. All components are read from the machine fine except an LCC gsm module MG323-b which has a particular ...
9
votes
3answers
7k views

Is there any pattern or standard to through-hole resistor sizes?

I've long been under the impression that a quarter-watt resistor has a standard package, and a half-watt resistor has a standard package, etc. But I've recently gotten through-hole resistors which are ...
1
vote
1answer
136 views

EagleCAD Device Dimension layer

I am creating an Arduino compatible with minimal parts (ie chip, caps crystal) and since it was available from Adafruit's EagleCad library decided to use the Arduinor3-noioref component for the pad ...
3
votes
1answer
115 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'...
1
vote
1answer
158 views

What is INCH/(MILLIMETER)?

This datasheet (see page 22) has the dimensions of its diagrams in "INCH/(MILLIMETER)". What does INCH/(MILLIMETER) mean? Is it a unit of length? (I would expect it to be unitless, given length/...