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Forum Index : Microcontroller and PC projects : Crazy electrical failures...

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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9910
Posted: 08:08am 23 Dec 2025
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This video IS a bit sensationalist, but I still liked it.

ELECTRICAL FAILURES....

May your Christmas be fault-free.    
Smoke makes things work. When the smoke gets out, it stops!
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 8667
Posted: 09:11am 23 Dec 2025
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Lovely stuff, electricity. :)

The first one looked like a busbar fire. Something that happens occasionally, just as any insulator fires do. Temperature changes, mechanical stress (directly or invisible because of fault levels between adjacent conductors trying to move them), they all cause problems.  :(

The package switch rooms we put in on one site had a "chicken switch" right by the door. Press that and all the breakers open, including the external ones feeding the local bus. You can't be too careful.

I had the pleasure of watching an air-break 36kV fuse switch being tested. That was nice, in a special HV test room (now long gone, unfortunately). :)  The thing was the size of a small room, with the air break switch and separate HV fuses in a steel box with polycarbonate sheets spaced off the walls on post insulators. The HV puts a charge on both sided of the sheet. The charge is proportional to the distance from the conductor.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9910
Posted: 06:06am 24 Dec 2025
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Here are some more electrical things.
Some are failures, some are just for entertainment.

MORE SPARKS!!!
Smoke makes things work. When the smoke gets out, it stops!
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 8667
Posted: 08:52am 24 Dec 2025
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Excellent! You can't beat a few fizzes, pops & bangs! :)

I love that little musical Tesla coil. Quite cheap too - I'm tempted. :)
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
ville56
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Joined: 08/06/2022
Location: Austria
Posts: 431
Posted: 09:45am 24 Dec 2025
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  Mixtel90 said  
I love that little musical Tesla coil. Quite cheap too - I'm tempted. :)


As a ham radio operator, I cannot approve that .... even though ....  
                                                                 
73 de OE1HGA, Gerald
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 8667
Posted: 09:59am 24 Dec 2025
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As a fellow (but non-operational) radio amateur neither can I. :)  It doesn't stop them being really cool though. hehe.

73
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9910
Posted: 01:50am 25 Dec 2025
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I really loved the swaying pendulum arc thing.
Also loved the musical Tesla coils too.

Perfectly safe to watch videos of, just don't try to build any of these yourself!
There - that is my disclaimer.    
Smoke makes things work. When the smoke gets out, it stops!
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 8667
Posted: 08:09am 25 Dec 2025
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A simple, basic Tesla coil isn't dangerous. There are plenty of low powered kits available too. There is something of a problem with RF interference though. :)  AliExpress have the little Tesla coils for about £18. They even have Bluetooth for audio.

Yeah, the pendulum is very nice indeed!
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
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