I believed this group would appreciate learning relating to this new charger which is run by hot and cold drinks. Company is functioning a kickstarter campaign and they're in excess of 70% to their intention of $100K in less than 10 times. Here is a link to obtain you there:
(The equivalent factors in the Standby-source section of the desktop-Personal computer PSU account for nearly all useless kinds of Individuals too.) BTW For Stay-side measurements I utilize a Tektronix P5200 HV Differential probe - this has long been a costly but most-helpful accessory and is good at rejecting stray-fields close to switching supplies!
Is it harmful to use a high output power charger, just like the HP TouchPad one, that has a minimal use machine, just like a cell phone?
For that reason, some equipment only perform with their own individual Exclusive chargers. As an illustration, an "incorrect" charger could possibly be rejected by an iPhone 3GS or afterwards With all the message "Charging is not really supported using this type of accessory".
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But a powersupply can be built to supply say one.1A continuous recent at powerup, and change to consistent-voltage mode once 5V is achieved. From then on it is going to shutdown when one.2A is touched...
Amusingly, semiconductor producers have just lately released chips that permit chargers to sequentially fake to become distinctive proprietary chargers until finally they trick the gadget into accepting the charger.
Ironically, soon after computing these specific electric power measurements, I only calculated the enter present-day by using a multimeter, multiplied by 115 volts, and received Just about the exact same outcomes for vampire energy.
This is astounding. I really like that you simply did the particular measurements listed here. This's an excellent object lesson for sustainable electronics designers / engineers.
Good information! Many thanks! Are you able to suggest a very good USB power tester to check for crap ahead of injuring self or things?
2W. The higher enter voltage aids some, although not a whole lot. In either case, the charger's output power is a whole lot decreased in comparison to the 5W it is designed to make. Incidentally, the charger states it takes 100-240V input; a real charger will work just as nicely with one hundred twenty as 240.
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The HP TouchPad charger Definitely must be inserted in the outlet Together with the USB interface nearer towards the grounding plug. For those who insert it While using the USB interface faraway from the grounding plug it won't operate.
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