Author Topic: EEVblog #1152 - 240V-120V=Magic Smoke  (Read 9489 times)

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Offline floobydust

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Re: EEVblog #1152 - 240V-120V=Magic Smoke
« Reply #75 on: June 03, 2019, 04:55:53 am »
I was a kid, figured it out while soldering a neon lamp in a some old gear.
It flashed every time I toggled the trigger  :o

The solenoid-style transformer has high leakage inductance as well, to make it worse.

I told my mechanic buddy to never use a soldering gun on cars and trucks, it could damage the electronics. It's pretty much the only place you need so much heat to solder.
 
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Offline Dundarave

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Re: EEVblog #1152 - 240V-120V=Magic Smoke
« Reply #76 on: June 03, 2019, 05:15:44 am »
I was a kid, figured it out while soldering a neon lamp in a some old gear.
It flashed every time I toggled the trigger
Thanks.  I can certainly understand how the electromagnetic pulse would flash a nearby neon, and I’m sure I’ve had the same thing happen to me back in the day, but I didn’t understand how a spark could actually be generated at the tip from back EMF, especially when my experience indicated otherwise.

But between the large e-mag pulse, and Ian.M’s explanation, I can see how today’s sensitive chips wouldn’t likely stand a chance.

Not that I was ever likely to use a Weller gun again for my electronics work, lol.
 


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