This is the comment I left in Big Clive’s channel video. “I think this shunting current away from the LEDs is deceptive and fraudulent. They should be required to tell this in the instructions. In the US there are regulations governing vampire devices such as the AC adapters and their efficiency levels. Since they’re on
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https://ieeexplore.ieee.org/document/8874589 Matt Undecided showed a photo of it.
This is hard to believe. It’s a lot of work to do on a cheap AM radio. But it gives me a lot of ideas. I wonder how many hours it took to do this, we see it happening in nust a few minutes. https://www.facebook.com/restorationpretty/videos/591611740013679/?mibextid=9drbnH&s=yWDuG2&fs=e
In the 1920s the TRF – tuned radio frequency – radios were hard to tune and their performance wasn’t very good. In 1929 the radio manufacturers started selling superheterodyne radios that had only one tuning knob, not several like the TRFs had. No more fiddling around with knobs to try to get good reception. Plus
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Watch the last few minutes of this 18 min. YouTube video to see the advertising on the box that tells what it does. This is really tragic. This multiple tap voltage boost transformer has to be used because the Indian electric grid is so overloaded that they can’t depend on the AC voltage to be
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Book Learn to Build Electronics Projects https://www.facebook.com/100064561517360/posts/pfbid02qmmukKwJbxWMs6HVLU11zNM5xfxdCX7nczjZdejgjrdGzsVs4RV8A7mNNgbTmJnAl/?mibextid=9drbnH&s=yWDuG2&fs=e
Here’s a 17 min. video describing the above in the title. It’s technical and somewhat complicated but calculates the power dissopated during switching. There are a lot of important details, such as the value of the gate resistor. I think I need to do a lot more studying about this topic.
Hot Arcs From Flyback Transformers Play “Take On Me” by Ah-hah. The flybacks are driven by a power amp made for driving these flyback transformers. Looks like just a few turns of 18 AWG wire are wrapped around the bare ferrite cores. A highly effective plasma speaker, better sounding than a Tesla coil. https://www.facebook.com/franzolielectronics/videos/272985324667136/?mibextid=9drbnH&s=yWDuG2&fs=e
He has a strong Aussie accent, a bit hard to understand. It’s a 28 min. YouTube video. He says BD139s have a fT of 250 MHz, but the datasheet I have does not specify any fT because the D in BD139 means they are a low frequency device, not meant for VHFs or RFs in
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