Usb power supply ps vita,how to know your horoscope 2015 balance,chinese compatibility horoscope 2012 - How to DIY

13.12.2013
I decided to check a couple of cheap USB power supplies and also a few more expensive ones.
In the test I also included a test with a high voltage ohm meter, to see how much voltage they can handle between mains and low voltage. Note: Many people call these units USB chargers, but they are not battery chargers, if you connect a battery directly to them they will damage the battery.
Featuring a new, ultracompact design, this power adapter offers fast, efficient charging at home, in the office, or on the go. A lot of spikes, this might be fine for running a simple charger, but not for anything electronic. The distance between the two red lines is what it protecting the user from the mains voltage. The output is not very stable and has a lot of noise, this can also be used for a charger, but is not very good for anything with electronic in it. The ps has a single rectificer diode, that charges a 2.2uF capacitor, this is very easy to see in the output with the 20 ms periode time. When it gets hot, the voltage drops a bit, but because it starts well above the minimum limit, there is no problem. The output is not very stable, and has a lot of noise, it is not very good for anything with electronic in it. On this ps the two usb data pins are shorted, this signales that it is a dedicated charger. The answer to that is definitly yes, it has absolutely no problems delivering 2A, it can deliver considerable more. This ps has a nice construction with input noise filter, bridge rectifier, control IC and opto coupler feedback.
The four usb outputs are in parallel and there is some resistors to control the voltage on the data pins, probably to make it compatible with Apple. It does also have a capacitor between primary and seconday, this is used to reduce noise and due to safety it MUST be a Y capacitor.
This adapter does not use wires to connect from the plug to the pcb, but some custom clips. The distance between mains and output is not that long, part of it is protected by the plastic shield. The charger was rattling when I got it, that turned out to be some loose plastic pieces inside the charger.


The green led on the power supply turns on at about 90 to 100mA load, the red is on when it has power.
Increasing the current a bit more and the voltage is far below specifications and not very stable. It does also have a capacitor between primary and seconday, this is used to reduce noise and due to safety it MUST be a Y capacitor, but the used capacitor is not. Blackberry Torch 9800 Bold 9700 Style 9670 Bold 9650 Tour 9630 Storm2 9550 9520 Storm 9500 9530 Blackberry Curve 8300, 8310, 8320, 8330, 8350i, Pearl 8100, 8110, 8120, 8130, 7250, 7520, 7100 and more. It looks like there is a white line between mains and low volt on the pcb, but this does not help with the distance, that is very short. The first test at 1A does not work as expected, after 23 minutes the ps begins doing funny stuff. It does also have a capacitor between primary and seconday, this is used to reduce noise and due to safety it MUST be a Y capacitor and it is. This ps looks the same as #2, but when looking at the tear down it is easy to see that the construction is different. 5, 9 and 10 are bought in Denmark, this means higher price (Denmark is very expensive) and probably better safety due to EU regulations. In the tear down section for each ps, it is possible to click on some of the pictures to get larger versions. One important aspect of safety is the transformator, in the above I have not disassembled it to see if it is safe, but anything that can handle 5kV will be mostly safe.
This item will be shipped through the Global Shipping Program and includes international tracking. Will usually ship within 1 business day of receiving cleared payment - opens in a new window or tab. By submitting your bid, you are committing to buy this item from the seller if you are the winning bidder.
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Your bid is the same as or more than the Buy It Now price.You can save time and money by buying it now. Wow, awesome comparison, thank you very much!I think I'll have to replace one or two USB power supplys I currently use.


I’ve always been wondering about that ioncell ps, but I’ve been so sceptical to chinese knock-off supplies, that I’ve just let it be until now – ordered! Recently there have been some tear downs of USB power supplies on the internet, where people has shown how bad quality and safety they where, I decided to also include a tear down to see how safe they look.
At the usb connectors it looks like the distance is short, but when the pcb is in the box, there is a plastic shield between the mains and the low voltage section.
I cannot see any feedback, but it has a very good regulation anyway (It is probably using a extra winding on the transformer for regulation).
The isolation distance is seldom large enough and many of the chargers has a lot of noise in the output. The item may be a factory second or a new, unused item with defects.A See the sellera€™s listing for full details and description of any imperfections. You have read and agree to the Global Shipping Program terms and conditions - opens in a new window or tab. Import charges previously quoted are subject to change if you increase you maximum bid amount.
Those teardown pictures are very helpful and really show the weak links.Do you have a plan on testing some 12V USB power supplys used in cars? Good to know that Intl Outdoor have a readily available safe model I can get should I need a replacement. This opto coupler does keep the output fairly stable, but because the ps cannot deliver much power, the output will drop at around 0.4A. There is also a problem with the output current, it is often considerable lower than rated.
If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable.
Cheers.—My current and or voltage measurements are only relevent to anything that I measure. Budget light hobby proudly sponsored by my Mastercard and unkowingly paid for by a hard working wife.



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