All Questions
23
questions
10
votes
3
answers
1k
views
Why did the Lucas voltage regulator use rectangular section enameled wire for one of the windings?
In the 1930s and subsequently, Lucas supplied a car voltage regulator of the twin bobbin type.
A detailed description of how it operated can be found here, but in summary, one solenoid operated a cut-...
- 109
9
votes
6
answers
6k
views
Reason not to use aluminium wires, other than higher resistance
So aluminium is 3.3 times lighter than copper (8.96 vs 2.70 g/cm3). And its resistance is only 55% bigger. So in weight/resistance ratio it is actually better than copper. Also it is cheaper.
Why ...
- 1,039
0
votes
2
answers
106
views
Which wire gauge (AWG) to make copper brushes?
I have to realize some sliding contact between a board and another one. The moving board has a fixed rail, and it can move horizontally.
I want to transfer power from the bottom board to the top one. ...
3
votes
2
answers
221
views
How to coat a thin electrical wire with carbon?
I am looking for glue that can be used under a bio-solution. The solution is a bacteria culture solution (LB, SB). I have a chamber filled with culture solution and I would like to extend an ...
- 77
2
votes
3
answers
10k
views
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. ...
- 145
1
vote
1
answer
120
views
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 ...
- 139
1
vote
1
answer
314
views
Enameled Silver Wire? [closed]
I like to use enameled copper wire where rubbery insulation would be a pain.
Recently I embarked on an electronics project with some lights that would look a lot better if the wires were silver color ...
- 904
1
vote
1
answer
895
views
How to test conductivity of copper wire? [closed]
I purchased 90 meters of 0.35mm2 stranded copper conductor wire. How can I test this wire for conductivity to ensure quality copper was used?
- 11
0
votes
0
answers
49
views
Power problems related to copper wires and pigtails
I am using a battery to power a odroid which requires 5V/4A. The battery voltage when measured using a multimeter was around 26.7.
I had two setups:
I used a 1 sq mm copper current carrying wire to ...
- 123
1
vote
2
answers
1k
views
Tank Water Level Indicator Wire
I am building a simple water level indicator (approx like the circuit below) for my tank.
However, I am wondering about the wiring, for I suppose copper cables corrode in water and produce toxic ...
- 11
-1
votes
3
answers
758
views
Why does having magnetic material in the middle of a stator help generate a current?
It seems unintuitive to me why putting a stationary hunk or iron or neodynium in the middle of a copper coil generator would increase its conductivity, because the metal could act as its own ...
- 121
0
votes
1
answer
163
views
Unifilar (non-stranded) copper wires flexibilty
we all know the 26 AWG wires that come inside UTP cables. Those surely are flexible. But what a bout an AWG 15-16 such copper wire, is it flexible enough to use as feeding cable for the 12 V car ...
- 1,061
0
votes
3
answers
2k
views
measuring resistivity of copper wire
I have a power supply, multimeter, and a copper wire with cross sectional area (A) A= 2.14*10^-3 m^2, Length L = 0.13 m and the resistivity of copper is p=1.7 × 10-8. The goal is to find the ...
- 1
-2
votes
1
answer
884
views
Creating EMP emittor, is this capacitor good?
I'm creating an EMP and i was wondering what the discharge on this capacitor is: 1 x Castle Cap Pack (50v, 12s LiPo, 880 Farads)
-Its used for helicopters and airplanes so surely this would be good ...
-4
votes
2
answers
938
views
Copper wire thickness
What diameter copper wire (single core, not isolated, open air) is needed to safely conduct 120A current from 22.2V battery to a load on 30cm distance?
Of course I searched on the Internet and there ...
- 543