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1
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3answers
214 views

Why does the cathode heat up more than the anode in an electric arc?

I have recently built a flyback transformer driver with a 555 timer, and have been drawing electric arcs. But I noticed that the cathode electrode(the HV pin on the transformer) heats up a lot more ...
-2
votes
1answer
45 views

How do plasma arc speakers work? Also, Bass? [closed]

Please see the following videos for examples of what I am asking about : https://www.youtube.com/watch?v=NeIAkKmUfn4 https://www.youtube.com/watch?v=rasp88nbsRw https://www.youtube.com/watch?v=...
4
votes
1answer
265 views

Does magnetism affect the likelihood of an electrical arc occurring?

Would magnetism affect the likelihood of an electrical arc occurring?
0
votes
1answer
75 views

240V AC to 30ish DC @ 40-200ish A [closed]

Alright so I will start with what I am trying to accomplish: So I want to build an power inverter based welder. I see these commonly in all new Lincoln and Miller welders. These all can change the ...
1
vote
1answer
48 views

How to measure relative light intensity (and ideally duration) of a xenon flashes, cheaply

I want to compare the light intensity (and maybe also duration) of multiple xenon flash designs. It does not have to give me the readings in any real unit, as long as it is linear (or mathematicaly ...
22
votes
4answers
3k views

How can a high-voltage transistor be in such small packaging?

For example: STN0214 - Very high voltage NPN power transistor It is said to accept more than 1 kV between its collector and emitter. It comes in a SOT-223 package (3 pins plus a tab). With a ...
0
votes
1answer
179 views

Can 0V from an isolated source arc to earth ground?

I have a high voltage bus bar (~300-400VDC) that is powered by a variac. This sits in a case that has other electronics that are powered by a step down transformer (120VAC to 24VAC, then rectified to ...
0
votes
3answers
385 views

Can I use a switch rated as 250VAC 25A to switch 50VDC 25A?

I am looking for a switch that can handle 25A continous current, the voltage will be maximum 50VDC, most often about 46VDC, and it will be used to switch on two dc-dc converters that have no load ...
8
votes
2answers
376 views

Understanding cause of arcing in AC filter circuit

I have an induction hot-plate that one day blew a fuse in my distribution panel when plugging it in. (With the obligatory smoke from the device of course) On visual inspection, only the AC filter ...
2
votes
1answer
343 views

Contact arcing, how to avoid?

Recently my water heater's thermostat failed. It's just a simple mechanical one, with a piece of metal that "pops" and connects or disconnects the heating element. I would guess that what made it ...
1
vote
0answers
83 views

How do electrical arcs carry less or more current with same supply voltages?

With a powerful microwave oven transformer, big bright white arcs with more current are created. With small flyback transformers driven by a simple oscillator, at the same voltage, arcs are thinner, ...
-1
votes
1answer
95 views

What is the necessity of arc management in a circuit breaker?

Why is an arc management necessary in a circuit breaker?
2
votes
1answer
301 views

Preventing Arc Discharge

I am repairing some ozone generators and one of them has a tower with a discharge path I can't seem to get rid of. Back in the heyday of television, my dad ran a side (hobby) business repairing bw tv'...
0
votes
2answers
277 views

Most compact high voltage source for making long arcs

Out of curiosity, I have a question about high voltage electricity sources. Hypothetically, the requirements are that the source must be no larger than a water bottle (although smaller is better), and ...
1
vote
1answer
225 views

Spark Transmitter with flyback driver and good arcs

I recently built a Fly-back Driver with a fly-back transformer and a primary voltage input of 12 volts and the arcs are about an inch long ( i don't know the exact output voltage because I don't have ...