Electronics > Beginners
Tapping into the ~400vdc from an active pfc circuit
viperidae:
If you tie the negative of the filter cap to ground (which neutral is tied to) then when the active line goes on its negative cycle it will short to ground via the diode in the bridge rectifier. Boom.
drussell:
--- Quote from: justinjja on September 15, 2018, 02:42:43 am ---Never mind I'll do this one without help, thanks anyway.
--- End quote ---
Well, if you insist on going it alone, please at least use proper fusing, consider a GFCI for a bit of added safety and learn what a "dim-bulb tester" is and use one while experimenting with things that might have the potential to go bang.
I blew up many a row of 7400 series logic and TRIACs and such building lighting controllers and dimmers when I was learning power electronics as a kid and it certainly helped me understand how this stuff works. I worked with >500 Vdc 8417 tube amplifiers and such which you need to have a healthy respect for. The first time your multimeter starts beeping maniacally at you and showing 1050 Vac on it makes you stop and think for a moment about what you're doing. :)
Just remember that 400 Vdc packs a lot more of a wallop than the not-so-scary 120V that comes out of the wall. Zapping yourself may well not kill you every time but it is a painful way to learn about high energy circuits! Be careful!!
ArthurDent:
This is a perfect example of the Dunning-Kruger Effect, described in the link. I just hope justinjja survives to watch this video.
ArthurDent:
Sometimes checking other threads the person has started can give you some clues as to why they trying something that would make everyone who has some technical background cringe. Here is a post in another thread that helps explain it.
"Bitcoin mining in my garage, I have my 200A service maxed out."
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