Questions tagged [copper]
The Element Cu known for its electrical and thermal conductivity, both of which are exploited in EE. THis material is typically what is used in PCB's for the traces and also modern CMOS processes have Cu layers in them due to it's superior conductivity. You also see copper in heat sinks to carry heat away from components.
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Why is the magnetic field not blocked by the copper wires in a current transformer?
When I want to protect an electronic board from a magnetic field generated by a transformer, I put a circle of vias (as a jail grid) connected to GND planes to stop the magnetic field.
How does a ...
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Crimp vs stainless steel intermediary for copper and nichrome connections in a heating element. Any difference in speed of heating?
I'm designing an electric furnace to melt aluminium. I'm planning to use the heating element from an electric oven.
I'm aware that the melting temp for aluminium is lower than copper BUT I don't want ...
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Can an insulated copper wire oxidize down its entire length?
I was doing some electrical wiring on a trailer today and was surprised to see black instead of shiny copper when I cut and stripped a section from the middle of a long section of uninterrupted wire. ...
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In PCBs, why is copper etched away instead of added?
I know that in virtually every case, PCBs start as a substrate with a layer of copper laminated on top, which is then etched away, leaving the traces. But why are the traces not added on an empty ...
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Fixing corroded contact surfaces on PCB
Looking at a Seagate HDD that no longer connects. The motor is running, but does not show in devices. The disk has production date is 12361 (2012-03-05).
Before having a look inside I checked out the ...
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How to repair broken coil?
I am working on my Grandpa's rare old watch which was damaged, the damage is with the coil in which one copper strand is cut. Its an enamel coated copper. How to repair the cut wire? and I want to ...
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What are the effects of small spark gaps on connectors?
I was reading about the '4th Pin' problem that effects almost all modern iPhone users. It is where the 4th pin on the lightning connector turn black and eventually will not work until it is scraped or ...
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Can the acetic acid base silicone sealant damage the lacquer layer of the enamelled copper wire?
I know that acetic acid silicone is not the best choice for electronics.
There is a passive audio crossover with large air core coils (70mm diameter, 20mm hole in the middle) .The coils are glued with ...
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Polygon pour on internal signal layer ALTIUM
I am working on a six layer PCB, the layers are Top layer, layer 1...layer4, Bottom layer. I am trying to create a polygon pour on any internal layers (for example layer 1). However when I try to pour ...
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Is the melting point of pure indium too low to safely use to solder together a custom copper heatsink to be used ontop of motherboard mosfets?
Is the melting point of pure indium too low to safely use Indium to solder together a custom copper heatsink that will then be used ontop a motherboard mosfet?
In other words, can the mosfets get hot ...
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Why are my copper PCB solder pads oxidizing?
I work at a place that sells LED strip lights and we don't have an engineering team, so I am hoping that someone can help me figure out what is going on because I've tried everything and I haven't ...
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Why did the liquid tin evaporate off my board when soldering?
On the weekend I designed and etched a tiny little 12V booster circuit for an OLED. To prevent the traces from oxidising in the future, I removed the leftover ink after etching and placed the board in ...
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Determine copper thicknesses for multi layer PCB
When deciding PCB stack-up generally accept the manufacturer suggestions. Especially they calculate the track impedance more accurate. For my last design I checked the guideliness for the FPGA (...
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Ferric Chloride Etchant Disposal
I am a beginner with PCBs and wanted to start making some. But before I did, I wanted to make sure I was completely prepared. I just wanted to make sure that the information I have is correct and had ...
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Would a square piece of copper have a similar maximum current rating as a copper wire?
If I have a 3mm x 3mm x 3mm piece of copper that conducts a DC current, is there a way to determine its maximum safe current?
I looked into here,
and found information for copper wires, shown below.
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