Yours is literally the second video I've watched of someone tearing down this exact same product and making the same comments about the hole where the power led would go etc. I like all your USB testing devices. I think I'll get myself some.
11:22 I was looking to get a power brick just for do exactly that... I'm glad I took my time to research this and came across this video after like an hour of watching useless crap. Thanks so much. Also it sucks... I obviously bought it for use it as a hub......... I guess I dumped my money. Even sadder thing is all electronic and computer store I visited on my area only had THIS crappy china hub :(
Wow, these +5V tracks are really thin. There is no switching action on the input side, both pins are connected together, not soldered tabs of USB connections. This thing has written China all over it. I guess that for charging things that hub needs some modifications like: soldering those tabs, putting something like a +5V bus bar inside and connect it to all sockets, maybe upgrade of that DC barrel socket to something more common like typical 2.1mm/5.5mm type. About that wall wart, it's still better than one of mine, at least yours has transformer bigger than USB socket, in mine they were roughly the same size. Actually there is a feedback circuit in this, there are two coils on primary side, one of them is used for feedback, that's why there is a zener diode. Overall still better than my "Samsung" charger.
I was planning to upgrade the jack if I didn't have a wall wart that matched the existing connector. It was getting to the point "how much effort do I really want to put into this thing?" You're right about the transformer winding - I didn't notice that the first time through. I was more fixated on the lack of opto-isolator when clearly they had designed the board to accommodate one. Thanks for watching. And for tthe informative comment!
Many computers have been ruined by feeding 5v back through the USB. Disconnecting it and using optocouplers in-between will stop your computer from being ruined! Fried or whatever. Even a diode in-line might even help. A couple of MacBooks died that way. You might want to revisit USB-Spec... 4.75v is the lower limit. Generally everything now will be demanding 5.1v and be very picky about any voltage drops.
Yours is literally the second video I've watched of someone tearing down this exact same product and making the same comments about the hole where the power led would go etc.
I like all your USB testing devices. I think I'll get myself some.
11:22 I was looking to get a power brick just for do exactly that... I'm glad I took my time to research this and came across this video after like an hour of watching useless crap. Thanks so much. Also it sucks... I obviously bought it for use it as a hub......... I guess I dumped my money. Even sadder thing is all electronic and computer store I visited on my area only had THIS crappy china hub :(
I found using old IDE cables work well as bodge wires. Boosting the amps I'd have run a power and ground bodge to each plug.
is it possible to cut the +5V line from hub to usb to prevent backfeeding and be able to use it with a pc? (11:00)
Yeah, that would work, but that's not really the main reason I bought it.
U can just use a hub without a power adapter if ur worried about back feeding.
Wow, these +5V tracks are really thin. There is no switching action on the input side, both pins are connected together, not soldered tabs of USB connections. This thing has written China all over it. I guess that for charging things that hub needs some modifications like: soldering those tabs, putting something like a +5V bus bar inside and connect it to all sockets, maybe upgrade of that DC barrel socket to something more common like typical 2.1mm/5.5mm type.
About that wall wart, it's still better than one of mine, at least yours has transformer bigger than USB socket, in mine they were roughly the same size. Actually there is a feedback circuit in this, there are two coils on primary side, one of them is used for feedback, that's why there is a zener diode. Overall still better than my "Samsung" charger.
I was planning to upgrade the jack if I didn't have a wall wart that matched the existing connector.
It was getting to the point "how much effort do I really want to put into this thing?"
You're right about the transformer winding - I didn't notice that the first time through. I was more fixated on the lack of opto-isolator when clearly they had designed the board to accommodate one.
Thanks for watching. And for tthe informative comment!
Many computers have been ruined by feeding 5v back through the USB. Disconnecting it and using optocouplers in-between will stop your computer from being ruined! Fried or whatever. Even a diode in-line might even help. A couple of MacBooks died that way. You might want to revisit USB-Spec... 4.75v is the lower limit. Generally everything now will be demanding 5.1v and be very picky about any voltage drops.
In it's final configuration, this thing is only being used as a dumb power bar.
It'll never get connected to a computer.
Yeah that’s why I use the usb hub without the power adapter.
I purchased the exact same usb hub a year ago or so. I agree they're total garbage, thankfully I didn't spend much on mine either.
See if the AC deathdapter works better if you fit it with a opto :D
Hmmm... I do have some around here somewhere.
"one of the risks of buying cheap crap from China"
Buys iPhone.... iPhone is 100% made in China