Did you keep records so that you actually know you repaired 15,000 TVs? I don’t believe it, and if it is not true then I doubt your other statements on this evidence alone. People should classify their statements as to fact, fiction, or opinion, not just leave them in an ambiguous interpretive limbo.
But at the very same time, if the rectifier dissipates enough energy for this to be a concern, then it is probably a poorly designed power supply to start with. As most power supplies will be designed for the voltage range of 110 to 250 volts AC. And as it will draw the most current down at 110 volts, then this is where the manufacturer has their specifications chiseled in stone, as if we want 1100 watts, then we need at least 10 amps when we have 110 volts AC on the input. This means that we “effectively” have 5 amps to dissipate per diode.
Watch this space, then: this is a super-competitive class that already offers something appealing for every taste. However, the Corolla is both very good and, thanks to its hybrid powertrain and dynamic leaning, different. At the right price and in the right spec, if it meets your priorities it could be exceptional.
This certainly looks like one of the more impressive ARM-powered Windows 10 laptops we’ve seen so far. The first few devices ran on the same Snapdragon 835 chip found in Android smartphones from last year, and they showed early promise with some issues that still needed work.
Theres a homebrew 80vdc @150amp supply in my cnc converted bridgeport, that runs the entire dc rail for the steppers and other stuff, its always scared me slightly because I know that the big transformer its based on has a mag field and when it collapses and it has some massive smoothing capacitors to boot, so I have masses of isolation distance everywhere the dc side runs and I disable the transformer with a dedicated switch while working in the cabinet of it. I had a stepper driver supplied directly off the rail go bad and it just had a large hole where it used to be. I just imagine that was a bit of me if I get tempted to get sloppy with it. I’ve never put much thought into getting electrocuted by a welder, I’ve tickled my finger with my 3 phase tig set more than a few times getting too close and giving a nice easy starting path to the startup pulse. Maybe I should, I’ve got a massive 3 phase 380v transformer tig that can do 375amp dc, that tends to throw all the breakers out while its saturating its massive transformer with the inrush current… I try to treat mains voltage with the respsect it deserves. Its a killer, but if you take sensible precautions and steps you can avoid it being you it happens to.
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I had my own suggestions further up in the comments here, and I’d like to believe I expressed them respectfully, and TJ addressed them. And, as is appropriate, the article text has an exhortation to not play with HV power without due care.
For a TRIAC I bend the middle pin forward 0.1″ – 0.2″, this is often done commercially and you can even buy them pre-bent.
That said, 12A @ 240V is only a little less than the most our Volt will use even on a proper charger, so it’s still a good thing.
First rule of LO-TO: if you didn’t LO-TO it yourself it’s not! I will never EVER trust anyone to do a LOTO for me. If I’m to stick my hands into something dangerous the key to that lock on the switch is going to be in MY pocket!
1. 25A for 22A? Too close for my comfort. 2. A thin sheet of aluminum is not much of a heat sink. 3. Sitting on top of the hot water heater means ambient temp is going to be a bit higher. 4. Summer in a garage is likely to get hot.
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