Questions tagged [dimensions]
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64 questions
2 votes
2 answers
1k views
Where to place the PCIe slot on a mini-ITX board?
I'm designing a mini-ITX board and it's surprisingly hard to find any info on where the PCIe slot is located. The mini-ITX spec that I found contains the board and screw dimensions but refers to the ...
- 526
3 votes
3 answers
2k views
What are the hole dimensions for 0.1" pitch headers?
What are the hole dimensions for 0.1" pitch headers? As discussed in How to breadboard with large lead components (such as TO-220)?, holes on standard 0.1" pitch headers are: Rectangular (...
- 1,379
0 votes
3 answers
447 views
What are the footprint dimensions for a GX-16 8-pin ("aviation") connector?
I would like to make through-holes in a PCB to mount a GX16 8-pin connector. I have looked everywhere but cannot find a source for the pin dimensions---and they are not consistent. I've measured with ...
- 2,268
0 votes
1 answer
95 views
Lithium polymer battery size versus energy density
I am building a small device that needs to use a rechargeable lithium polymer battery. The dimensions I am looking for are 351125 { 35 mm (H) x 11 mm (W) x 25 mm (L) }, which is the standard way these ...
1 vote
1 answer
80 views
Faston/Lucar blade thickness
Does the blade thickness of Lucar/Faston-type connectors vary methodically with both blade width and "colour" i.e. wire rating? I'm looking at some UPS cells with blades which appear to be 0....
0 votes
3 answers
284 views
Alternative to pull-up resistor
I am building this AND gate, and I managed to get it to work properly. However, I had to increase the value of the pull-up resistor to 3 megohms which is too big for what I need. However if I don't ...
- 113
0 votes
1 answer
363 views
Capacitor taping Vs straight leads
I can't understand what means in the datasheet below where it writes "Lead Space: Taping or Straight". With taping means that the leads have outside bend in order to increase the pitch ...
- 853
0 votes
1 answer
245 views
Does anyone know the physical dimensions of the Microchip PICkit4 programmer?
Does anyone know the physical dimensions of the Microchip PICkit4 programmer (PG164140)? It would be useful to know so that I can leave proper clearance on my PCB around the programming header. I ...
- 13.5k
3 votes
1 answer
6k views
What is the maximum height (thickness) per slot for a finished (soldered/populated) PCI express card?
The main question is: Defined by maximum allowable height from the surface of the PCB on both sides (soldered pins and components), or whatever metric experts think would be most useful in decoding an ...
- 194
1 vote
3 answers
447 views
AutoCad Eagle: dimension markings not rotating correctly
I have a library component in AutoCAD Eagle. I want to include dimension markings on the Reference layer. I opened the component library, and used the Dimension tool to mark the dimensions I need. I ...
- 1,510
2 votes
1 answer
1k views
Have AAA batteries gotten shorter? [closed]
I'm finding that the standard AAA battery from most manufacturers (including Duracell and Energizer) have gotten shorter and don't fit as tightly in my alarm clock and HP-48 calculator. The old ...
- 2,561
0 votes
3 answers
73 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 ...
- 458
1 vote
1 answer
207 views
Cable dimension for different loads
I have 40 loads connected to the same power supply. If every load draws 0.5 A in current and all of them 20 A. According to this I need cable dimension of 2.5 mm² for the main cable and then 1.5 mm² ...
- 213
1 vote
2 answers
246 views
Find a commercial transistor with known channel width, channel length, dielectric thickness, etc for experimental purposes?
I want to buy a commercial transistor, with known dimensions (channel width/length, dielectric thickness, materials etc.) This data is necessary to select a transistor most compatible with my ...
- 261
0 votes
3 answers
5k views
Ideal dimensions for an electromagnet?
I've been working on a design for an electromagnet. I've exprimented various lengths of core, and figured the height of the windings for 6 different gauges of magnet wire based on the maximum current ...