Transcend 創見 深水埗門市於2014年9月25日起正式停止服務

https://www.facebook.com/TranscendHK/photos/a.133376916726606.24924.133106433420321/778041778926780/?type=1

https://www.facebook.com/TranscendHK/

Transcend Hong Kong

[重要通知]

深水埗門市於2014年9月25日起正式停止服務，感謝客戶對Transcend的支持，九龍灣維修中心將繼續為客戶提供優質服務。



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https://www.facebook.com/TranscendHK/photos/a.133376916726606.24924.133106433420321/778041778926780/?type=1&comment_id=778070518923906&offset=0&total_comments=1

2014年9月16日

客戶可聯絡以下Transcend經銷商進行產品訂購，亦可預先致電經銷商查詢產品價格及現存數量。

一般JetFlash USB/SSD等產品：
各大電腦商場店鋪

Apple Solution產品：
九龍區：
Fine Up Computer Ltd.
地址：香港九龍深水埗福華街146-152 黃金電腦商場G/F樓42-44號鋪　
電話：(852)2361 1295

香港區：
High Tech Computer Ltd.
地址：香港灣仔軒尼詩道 130 號 灣仔電腦城153 號鋪
電話：(852)2317 4555

A-Lab Technology (298) Ltd.
地址：香港灣仔軒尼詩道298號 298電腦特區143-145, 298號舖
電話：(852)2891 0371

全港(全線門市)：
Studio A Technology Ltd
Sunion Telecom (Internatl) Ltd
NewVision

如有任何問題，歡迎與Transcend聯絡，謝謝。
辦公時間：Mon.-Fri. 10:00AM-6:00PM (公眾假期除外)
電話：(852) 2331 8929


客戶可從官方網站查詢所需型號，然後致電經銷商（電話：2950 0175）查詢銷售店鋪及訂購狀況，謝謝。
http://hk.transcend-info.com/products/mem_search.aspx?catno=317



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http://hk.transcend-info.com/support/contact

創見資訊 Transcend Info

香港九龍灣臨樂街19號南豐商業中心10樓17-18室 Unit 17-18, 10/F. Nan Fung Commercial Centre, 19 Lam Lok St. Kowloon Bay, Hong Kong
TEL: +852-2331-8929
Fax: +852-2331-2987



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USB OTG and charging at the same time (Computers - Ainol Novo 7 - android 4)

OTG MODE & CHARGING AT THE SAME TIME - XPERIA S
http://www.youtube.com/watch?v=-v7DjU6nsVM

Xperia Mini OTG and charge and usb HUB with 6 devices

http://www.youtube.com/watch?v=vg5O5ExuuaQ

HOW TO MAKE SIMPLE OTG CABLE [TUTORIAL]

http://www.youtube.com/watch?v=zsMl0tfJXzI

How to make a USB Y cable for host mode on HP TouchPad or Android

http://www.youtube.com/watch?v=p10LgZFIawo

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http://bbs.imp3.net/thread-621678-1-1.html

標題: 改造USB充電器，照樣實現OTG功能。

---

作者: tjds50    時間: 2009.7.12 11:33
標題: 改造USB充電器，照樣實現OTG功能。
本帖最後由 tjds50 於 2009.7.12 14:56 編輯 

看到有魅族電池和的朋友興高采烈地使用艾諾固件提供的OTG功能，心裏十分羡慕。無奈自己沒有那個電池盒，只好自己動手改造了。前提是用資料線連接的那種充電器。


原來有一個道勤的RM-09播放器，原配一個充電器正好用來改造。


先把資料線剪斷，發現裏面有紅 、白、綠、黑四根線。剪短紅線以免MINI USB 口向小機供電。只用白、綠、黑三根線。

打開充電器，分別把黑線連接充電器標準USB母口的電源負極（接地線）：綠線連接挨著地線的那個接點：白線接到第三個接點。這樣焊接好後在充電器相應位置開個出線口後把充電器組合好就完成任務了。

把充電器插到電源上，MINI口接小機，把優盤插到充電器的USB母口上，開機選擇USB外設後按確認鍵。很快機器就找到優盤並出現盤符.至此就可以播放優盤的檔了。


在充電器的USB母口上連接硬碟也成功（曾經為把升級電腦後換下來的硬碟做USB硬碟用買過一套富運達科技的USB2.0 IDE Adapter)

上些圖片：

改造後的充電器（用資料線還可以給原機器充電），引出一個MINIUSB介面。

充電器元件面

充電器焊接MINIUSB介面的位置

連接優盤情況

連接硬碟情況，硬碟內的三個盤符列表

其中一個盤符內的列表

播放硬碟中的視頻檔

不知道這次行不行

補充幾句，優盤、硬碟還都可以中斷點續播，看起來這個固件製作的不錯。固件大小比前幾版本小了一半多，證明垃圾文件都精簡了。
還望艾諾再接再厲，充分挖掘索智晶片的潛能。
如果有軟體支援，那麼CC1600也可以這樣實現OTG功能吧？？？

我的OTG實施方案目前自己比較滿意，不用去商家拿那個專用線了，而且還可以用改造艾諾原配的充電器做外接電源。哈哈，再連接好電視，這個小機器的所有介面都插滿了。

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http://eng.samaanetwork.com/?p=8026

USB OTG and charging at the same time [UPDATE]

Hi there,

So I been looking for a way to both charge and use USB OTG after a short search in Google I found this:
http://www.youtube.com/embed/p10LgZFIawo

basically this guy used a simple USB Y cable which look like this

If you look inside that cable it would probably look like this:



so from that pattern we can see that there is no way that our S3 will charge (frankly saying I don’t really know why his TouchPad was USB and AC Charging signalling [HOW TO] – INFO” href=”http://eng.samaanetwork.com/?p=5027″>charging)

there is a simple explanation why it won’t charge, there is something that called "USB Battery Charging Specification" which is some kind of a standard for charging via USB port therefore for the phone to recognize that a charger is connected the D+ and D- should be shorten together or connected through a 200k resistor (BTW to charge an iphone it should sense a voltage on D+ and D- but it is a different story, what I’m trying to say is that it is true for all phones).

we could just connect the D+ and D- in the Y cable and charge but then the OTG won’t work because it need the D+ and D- to transfer data

OK so what now? is it possible?
well probably it is possible somehow.

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Possible USB OTG Power collision in hub ?

http://forum.xda-developers.com/showthread.php?t=1613536

2nd May 2012, 11:02 AM

The red cross indicates the one wire collision when DEVICE B provides power. If device B doesn`t provide power there won`t be any problems surely.

But as I thought of it, there is no solution for it - parallel voltage will surely damage one device on one side. The power sources providing high-efficient PWM power has very very low input resistance. So if we connect any voltage to its output, very high current will flow throught and surely damage the power source. This can happen very easily, because from phycisict`s point of view the higher voltage source will damage the less voltage source (there is +/- 10% tolerance on USB power, so this could happen everytime).

So now I am thinking about some mosfet auto switching circuit, which could automatically connect or disconnect power from master device... Or maybe will simple add an switch which will disconnect the power from master device everytime and power just a slave.




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4th May 2012, 12:41 AM

It doesn't pay to overthink this.
These devices are usually designed to take a beating.
Just connect all the Vcc's together.

I've been using something similar on my B&N Nook Touch for months.
It's not a solar charger, but a modified $10 USB hub.
I can use USB host mode on my Nook and charge at the same time.
Of course, all the peripherals are powered off the hub power supply too.
A general schematic is attached, pull the diode and insert a jumper.

Since USB was really not designed to charge in host mode,
there are two problems related to getting the device charging circuit to play nicely.

• When using host mode to directly power a peripheral you must make the device charging circuit go off.
  To go into host mode the device must raise the Vcc line to 90% of 5V, i.e. >4.5V.
  If the device charging circuit is still enabled it will try to charge itself using itself!
• When using host mode with incoming power the device charging circuit must be convinced to charge.

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USB On-The-Go - 維基百科，自由的百科全書 (knowledge - computer - hardware)

http://zh.wikipedia.org/zh-hk/USB_On-The-Go

USB On-The-Go

維基百科，自由的百科全書

USB OTG 標誌

USB On-The-Go通常縮寫為USB OTG，是USB2.0規格的補充標準。它支持讓USB設備，例如數字音頻播放器或手機作為主機，允許USB閃存驅動器、鼠標或鍵盤與其連接。

目錄   [隱藏]  1 架構 2 規格 3 協議 4 設備角色 5 目標外設列表 6 接口 6.1 OTG迷你接口 6.2 OTG微型接口 7 OTG微電纜 8 向下兼容性 8.1 充電器的兼容性 9 參見 10 參考資料 11 外部連結

[編輯]架構

標準的USB使用主從（master/slave）的架構，USB主機端（即電腦）是「主」，而USB周邊裝置（Peripheral）是「從」。只有USB伺服器可以排程該連結的設定與資料傳輸。USB周邊裝置不能夠啟動資料傳輸，只能回應伺服器的指令。

USB OTG改變了這種狀況。配件不再需要一定要成為單純的周邊裝置，它們有時候也可以成為主機端。舉例來說，USB鍵盤或打印機可以與手持的無線元件結合。或是打印機會自動從特定周邊裝置中找出要打印的文件來打印。有相容USB OTG標準的元件能夠啟動並控制連結，也可以自行切換主機端與周邊裝置的角色。 不過目前支持的廠商比較少，主要是數碼伴侶支持此功能，移動電話在中國大陸只有少數幾款高端使用Windows Mobile系統的支持此功能。現在不少播放器開始支持此功能，但大多數在主端時只支持讀取功能。

[編輯]規格

[編輯]協議

[編輯]設備角色

[編輯]目標外設列表

[編輯]接口

[編輯]OTG迷你接口

[編輯]OTG微型接口

[編輯]OTG微電纜

[編輯]向下兼容性

[編輯]充電器的兼容性

主條目：USB

有些設備可以通過USB端口為其電池充電；有些甚至可以檢測到專用充電器，並汲取大於500mA的電流量，以幫助其更快速的充電。OTG設備也不例外。^[1]

[編輯]參見

[編輯]參考資料

1. ^ Battery Charging Specification. USB Implementers Forum, Inc. 15 April 2009 [23 September 2009].

[編輯]外部連結

• （英文）USB On-The-Go官方網站
• （中文）USB OTG(On-The-Go)簡介
• （英文）USB On-The-Go Basics

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Bits, Bytes and Bandwidth Reference Guide - Abbreviations Table (knowledge - 電腦)

http://www.speedguide.net/articles/bits-bytes-and-bandwidth-reference-guide-115

SpeedGuide_net: Bits, Bytes and Bandwidth Reference Guide

Bits, Bytes and Bandwidth Reference Guide

2001.01.01 01:53 by Philip
Keywords: bit, byte, conversion

Quick Conversions...

For a quick reference, ue our Bits/Bytes Conversion Calculator.

For the few people that care to learn it right (or be confused to death), read on ;)

The Bits vs. Bytes Confusion

Let's start with some background information on prefixes, by mentioning the Metric system:

• kilo (k)* = 10 ^ 3 = 1,000 thousand
• mega (M) = 10 ^ 6 = 1,000,000 million
• giga (G) = 10 ^ 9 = 1,000,000,000 billion
• tera (T) = 10 ^ 12 = 1,000,000,000,000 trillion

* Note that according to the Metric system, the "k" or "kilo" prefix is always lowercase.
The binary forms of kilobytes and megabytes have become standard throughout the computer industry, although they are incorrect uses of the SI prefixes (in the IT field lowercase "k" is used to describe decimal kilobits, and capital "K" is used for binary kilobytes).


When used to describe Data Transfer Rate, bits/bytes are calculated as in the metric system

In data communications, a kilobit is a thousand bits, or 1,000 bits. It's commonly used for measuring the amount of data that is transferred in a second between two telecommunication points. Kilobits per second is usually shortened to kbps or Kbps**. Some sources define a kilobit to mean 1,024 bits. Although the bit is a unit of the binary number system, bits in data communications are discrete signal pulses and have historically been counted using the decimal number system. For example, 28.8 kilobits per second (kbps) is 28,800 bits per second.

• 1 bit (b) = 0 or 1 = one binary digit
• 1 kilobit ( kb) = 10^3 bits = 1,000 bits
• 1 Megabit (Mb) = 10^6 bits = 1,000,000 bits
• 1 Gigabit (Gb) = 10^9 bits = 1,000,000,000 bits

** Note:  Although technically speaking, the term kilobit should have a lowercase initial letter, most published reports capitalize it in abbreviation, resulting in "56 Kbps," or even the really confusing "56K."  That leaves you with the sometimes omitted lowercase "b" to distinguish between bits (b) and bytes (B). When used as a measurement of network data transfers, or throughput, always assume the word is bits first.

When used to describe Memory Size, or Data Storage bits/bytes are generally calculated as some exponent of 2

In Data storage, and when describing Memory size, a Kilobyte is 2^10, or 1024 bytes. Because of binary computer architecture and memory address boundaries, bytes are always some multiple or exponent of two.

• 1 byte (B) = 8 bits (b)
• 1 Kilobyte (K / KB) = 2^10 bytes = 1,024 bytes
• 1 Megabyte (M / MB) = 2^20 bytes = 1,048,576 bytes
• 1 Gigabyte (G / GB) = 2^30 bytes = 1,073,741,824 bytes
• 1 Terabyte (T / TB) = 2^40 bytes = 1,099,511,627,776 bytes

Although data storage capacity, such as on hard drives is generally expressed in binary Megabytes (2^20), most Hard disk manufacturers, and some newer BIOSes use decimal megabytes (10^6), which is slightly different and it gets confusing...

• 1 byte (B) = 8 bits (b)
• 1 Kilobyte (K / KB) = 10^3 bytes = 1,000 bytes
• 1 Megabyte (M / MB) = 10^6 bytes = 1,000,000 bytes
• 1 Gigabyte (G / GB) = 10^9 bytes = 1,000,000,000 bytes
• 1 Terabyte (T / TB) = 10^12 bytes = 1,000,000,000,000 bytes

Abbreviations Table
 

bit	b	0 or 1
byte	B	8 bits
kilobit	kb	1000 bits
kilobyte (binary)	KB	1024 bytes
kilobyte (decimal)	KB	1000 bytes
Megabit	Mb	1000 kilobits
Megabyte (binary)	MB	1024 Kilobytes
Megabyte (decimal)	MB	1000 Kilobytes
Gigabit	Gb	1000 Megabits
Gigabyte (binary)	GB	1024 Megabytes
Gigabyte (decimal)	GB	1000 Megabytes

Bandwidth Reference Table

DS0 (digital signal 0) is digital transmission rate of 64 Kbps, the bandwidth normally used for one telephone voice channel. It is the base multiple for both T (North America) and E (Europe) DS (digital signal) carriers.

The following table summarizes the set of signals and their relationship to the T-carrier and E-carrier systems

SG Bandwidth Reference Table
DSx / Ex / Jx	Data rate	DS0 multiple	Carrier
DS0(E0/J0)	64 kbps	1
	128 kbps	2	ISDN
DS1	1.544 Mbps	23 (24)	T1
E1	2.048 Mbps	30 (32)	E1
DS1C / J1C	3.152 Mbps	46 (48)	T1C / J1C
DS2 / J2	6.312 Mbps	92 (96)	T2 / J2
E2	8.448 Mbps	120 (132)	E2
J3	32.064 Mbps	480	J3
E3	34.368 Mbps	480 (537)	E3
DS3	44.736 Mbps	644 (672)	T3
STS1	51.84 Mbps	672	OC1
DS3C	89.472 Mbps	1288 (1344)	T3C
J4	97.728 Mbps	1440	J3C
DS3X	134.208 Mbps	1932 (2016)	T3X
E4	139.264 Mbps	1920 (2148)	E4
STS-3 / SDH-1	155.52 Mbps	2016	OC3
DS4	274.176 Mbps	3864 (4032)	T4
J5	400.352 Mbps	5760	J4
DS4E	411.264 Mbps	5796 (6048)	T4E
STS-9 / SDH-3	466.56 Mbps	6048	OC9
DS4C	560.160 Mbps	7728 (8064)	T4C
E5	565.148 Mbps	7680 (8592)	E5 (4 E4 chnnels)
STS-12 / SDH-4	622.08 Mbps	8064	OC12
DS4X	822.528 Mbps	11592 (12096)	T4X
STS-18 / SDH-6	933.12 Mbps	12096	OC18
DS5	1.120 Gbps	15456 (16128)	T5
STS-24 / SDH-8	1.244 Gbps	16128	OC24
DS5X	1.400 Gbps	19320 (20160)	T5X
DS5E	1.680 Gbps	23184 (24192)	T5E
STS-36 / SDH-12	1.866 Gbps	24192	OC36
STS-48 / SDH-16	2.488 Gbps	32256	OC48
STS-96 / SDH-32	4.976 Gbps	64512	OC96
STS-192 / SDH-64	9.952 Gbps	129024	OC192
STS-256	13.271 Gbps	172032	OC256
STS-768 / SDH-256	39.813 Gbps	516096	OC768

Note: The following digital signal levels are not standardized and/or are not in common use:
DS3C, DS3X, DS4E, DS4C, DS4X, DS5, DS5X, DS5E, E5, J5, STS-9, STS-18, STS-24, STS-36, STS-256, STS-768.





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電腦 - 硬件 Hardware -- 網址 URL

Computer 電腦 - 硬件 Hardware -- 網址 URL





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