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>Construction of USB cables
alex @ rya
Message#1
25.02.17, 12:17
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Designs from USB-wires



In this thread we try to create different things from USB-wires.

Topic with no curator.
For filling the caps, please contact the section moderators via the buttonPictureunder messages orin the QMS. How to do it correctly, what would you have understood the first time, it is writtenhere.
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Message#2
12.12.12, 01:30
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Of the 4-wire telephone wire, usb-dad and -mama made a 3 meter usb extension cable. And it seems to be working fine, but when connected via a hub a USB flash drive is not detected by the computer. Says an unknown device. A tablet is determined. And if together with the tablet in the hub to stick a USB flash drive, then the tablet will be connected / disconnected once a half-second. The tablet does not charge through the extension cord. Without it, it charges. 3G modem flashes, but does not work.
Where does the energy flow? At the connection site (connected by soldering) of the cut off usb cable with the telephone? Or is the telephone cable bad for such purposes?
I unfortunately do not have a voltmeter.

Post has been edited200600 - 12.12.12, 01:32
Alex_1959
Message#3
12.12.12, 12:03
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What kind of cable specifically you, of course, is not known.
But telephone (and especially - twisted) wires usually have a rather large resistance to resistance.
For example, even the usual old two-wire wire "noodles", used for internal wiring, for WHOLESAL copper wires with a diameter of ~ 0.3 mm, has a linear resistance of each conductor of about 0.5 ohms / m.
If you used not such a wire;), but some soft, then the veins are even thinner (more often - bundles of thin "springs", wound on threads), and therefore have even greater resistance.
But even if you have specific resistance of EACH of the power conductors (+ and -) will be 0.5 Ohm / m, then the impedance of the 3-meter cable will be (3 + 3) * 0.5 = 3 Ohm.
At a current of even 0.5 A (500 mA), the conductors will drop 3 Ω * 0.5 A = 1.5 V
Consequently, up to the consumer (phone) of 5 V on the USB connector of the computer will reach only 5-1.5 = 3.5 V
And to charge the battery from USB to the phone you need to apply at least 4.5 V (voltage on the charged battery is ~ 4.2V + at least 0.3V - on the charge controller).

So the problem you have is unequivocal - in quality and length of the wire.

Post has been editedAlex_1959 - 12.12.12, 12:05


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Message#4
08.01.14, 23:24
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From twisted pair do
Skondr
Message#5
14.01.14, 00:41
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The kyocera 1016 printer is connected at work through 2 extensions. A total of 5 meters from the company. Working. But a percentage of 2 out of 100 can print out noise (like on a TV without a signal).
Hippocamus
Message#6
02.07.15, 00:00
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Dvuhhapernaya charging (original for the tablet) through a 3-meter usb-extension (factory) does not charge the Alcatel EVO7 HD - well, VAPET! Played, left at night - as was 15% - and remained. But it allows you to work with a fully discharged device.
But all the same - I use - it happens, I want to play at night - and in the morning I go to work with a charged device.
Five-ampere charges, I will not say so fast. And I'm afraid to damage! Once the device started to click once every 2 seconds somewhere, I pulled out the charging. The battery would sit 10 times faster and not recharge. And clicked on when turned on. After a complete discharge, it all began to work - and pah-pah. No more expert.

Apparently, something is lost somewhere (voltage or current, I'm not particularly in this).

Post has been editedHippocamus - 02.07.15, 00:08
berkut_0
Message#7
08.11.16, 20:37
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Hello everybody.
1. I have such a question: what will happen if the next construction I put in the phone?
Design
The gray box is a trusted bank;
White wire - feedstock;
Black wire - USB-OTG
Posted image

Who will charge whom? And will it?

2. So the question is, what will happen if you get a white wire from the station and put it in someone's phone? Who will charge whom?
Wires
Posted image

3. And finally: what happens if I stuck both ends of the wire of the bank in the same poverbank?
Poverbank
Posted image


Post has been editedberkut_0 - 08.11.16, 20:44
Shibzik
Message#8
10.11.16, 19:46
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: Lol: so stick in and see everything ...: D


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berkut_0
Message#9
13.11.16, 17:17
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* Shibzik,
I'm not just asking - I do not want to see trouble
BigFishCrazy
Message#10
13.11.16, 17:39
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I'm not just asking

It is very similar to the fact that just like this


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Stranger John the Ku
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Message#11
17.11.16, 14:34
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1. 2. In the microUSB connector, the "who's daddy-who's mom" mode is determined by the voltage on the special contact. EsteemWikipedia. Appropriately from the connector that the "host" energy will flow, to that connector that "client".

3. Electricity will race in a circle, gradually escaping into heat.
Vulcanus
Message#12
19.11.16, 07:31
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2. The output power will not be missed most likely, in this case no one, no one, can it be that to buy / make a boost module, then it will be possible to charge another one from one phone.


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Shibzik
Message#13
21.11.16, 21:21
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Well, don `t know ... My Sony z3 charges my wife's phone ... there after all, in fact, there is a converter 5v 500mA for powering connected flash drives, mice and klav. And here if I connect a hub and to it radio a mouse and a clavus, the phone starts to matter, saying a large consumption


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GoodWin001
Message#14
31.01.17, 10:12
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Good day.
It took me an extension cord to power the 4g modem.
There are a lot of options on the net, but the easiest thing seemed to me: "We take a twisted pair and solder the plug and socket (1 pair for the date" + "," - ", 3 pairs for" + "and" - ")"
What I did: took a 15-meter copper twisted pair, soldered and did NOT work.
On the extension jack shows voltage 5.06 V. When external HDD is connected, the voltage drops to 3.9 V then it seems to be equalized to 4.7, but the computer writes "Unknown \ Unidentified device". And does not work. Tried to connect and ordinary flash drives to sense 0.
slaiferr
Message#15
31.01.17, 18:59
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I was able to make a maximum of 9 meters long extension cable, which worked. Next, you need to stick an active USB hub and again you can reach 9 meters. It all depends on the quality of the cable. This is the easiest way.
You can, of course, connect additional power at the input of the extension cord, but at 15 meters it will still die out.


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GoodWin001
Message#16
01.02.17, 13:47
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* Slaiferr,
I tried additionally only feeding 5 in the feed to the "outlet" of the extension cord. Still did not work.
muraveiX
Message#17
02.02.17, 06:35
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In addition to power, you need to pull the capacity of the wires, otherwise the signal fronts will be flooded, so there will not be enough wiring.
Buy Nowthis, Can help.
slaiferr
Message#18
02.02.17, 12:51
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* GoodWin001,

So there remains a variant with two extension cables of 9 meters (the shorter the better) and the active hub in the middle. Or you can even passive the hub, but on the second extension cord to apply power from charging the phone for example.


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GoodWin001
Message#19
02.02.17, 13:19
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Slaiferr @ 02.02.17, 09:51*
Passive hub,

And what good passive hub will make?) Only loss on connections)

I say right now, as an experiment, I fed the 5 in (from charging just) to the "end" of my extension cable, it did not work with him. The truth I noticed that he does not nest at all, the nest comes to tension, but there are no nests on the contacts. Miracles or my krivorukost. I solder.
slaiferr
Message#20
02.02.17, 16:53
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* GoodWin001,

GoodWin001 @ 02.02.17, 13:19*
And what good passive hub will make?) Only loss on connections)


At a minimum, amplification, or updating of data signals. And anyway, I've described to you a scheme that actually works and is checked by me more than once ...


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MOBILE - the best inventions of mankind !!!!!
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Message#21
10.03.17, 13:53
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It is necessary to do something, a USB flash drive worked in the car!
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Post has been editedctich - 10.03.17, 16:47



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