Ken, great post! Have a look at PortPilot, an inline USB power analyzer that identifies charger forms, exhibits the output voltage and present, and may spoof diverse charger kinds around the output. No match to get a TDS5104B, but less expensive and fits with your pocket...
Taking into consideration the effort you put into your investigate, I am astonished you failed to contact Rod Holt. Over time I have met many people who realized Rod. Even though some disagreed along with his politics, I in no way fulfilled anybody who disliked him.
Fashionable Laptop or computer electrical power provides are absolutely distinct and do not rip off anything from Rod Holt's design. It seems that Steve Jobs was producing his customary declare that everyone is stealing Apple's groundbreaking technological know-how, fully Opposite towards the points.
The HP touchpad charger seems like a slightly bigger Variation of my outdated Palm Pre charger. I checked, the prongs twist off in the same way, experienced that For many years, under no circumstances knew. It would be wonderful to view it examined also.
You say your earlier teardowns wherever "shockingly preferred", considering that your composing is usually a amazingly good browse for this kind of dull subject matter, and not only a good read through, but a very thorough investigation of the essential issue.
An in depth dialogue in the Apple II Moreover energy provide is at applefritter.com. The outline erroneously phone calls the power provide a ahead converter topology, but it's a flyback topology. Inconveniently, this dialogue won't match the Apple II Additionally electrical power offer schematics I've observed.
The transistors of that point could not change all that speedily, Hence the switching frequency was an incredibly audible whine, but it absolutely was site here absolutely a switcher. It took up a lot of the ideal-hand drawer on the "desk".
I am not convinced regarding how A lot There is certainly into the claim of "returning ability for the converter", considering that in the first place the voltage peaks being snubbed or clamped in the first place must be minimized. Clamping and snubbing usually means a decline.
Did tests on my samsung journey charger with 5.0V ; two.0A ; 10W outupts and it beats the crap in all designs you examined but provided that applied adequately; design no. ETA-U90EWE
A device remaining billed can detect what sort of charger is being used through distinct voltages around the USB knowledge pins.[six]
You should do A different round of tests and come across me a USB charger. I have a LG G3 and its extremely picky about what Qi charger and USB charger it likes.
Due to the fact switching electric power materials use power in irregular waveforms, I utilized a complex setup to measure power usage. I calculated the AC enter voltage and current with the oscilloscope.
The Apple II was not like other residence computer systems in the working day. An attention to depth and quality of development pretty much established it aside. The ability provide was a thoroughly clean and custom designed to the package deal. Its peaceful and productive Procedure matches the pleasing overall look of its construction and layout.
For this reason, some devices only work with their unique special chargers. As an illustration, an "incorrect" charger may be turned down by an apple iphone 3GS or later on While using the message "Charging is just not supported using this accent".