http://www.adafruit.com/products/954
The cable is easiest way ever to connect to your microcontroller/Raspberry Pi/WiFi router serial console port. Inside the big USB plug is a USB<->Serial conversion chip and at the end of the 36" cable are four wire - red power, black ground, white RX into USB port, and green TX out of the USB port. The power pin provides the 5V @ 500mA direct from the USB port and the RX/TX pins are 3.3V level for interfacing with the most common 3.3V logic level chipsets.
Because of the separated pin plugs, this cable is ideal for powering and connecting up to the debug/login console on the Raspberry Pi or BeagleBone Black. Connect the pins as shown to power the Pi or BBB and establish the RX/TX link. Then install the Windows XP/Vista/7 or MacOS X PL2303HX.A drivers on your computer and connect with a terminal program at 115200 baud. Windows 8 is not supported.
Also handy for hacking WiFi routers to install alternate OS's, or nearly any other TTL port. This is easier to use than an FTDI cable in many cases because the wires are separated
This cable is not good for Arduino re-programming such as a Boarduino, MENTA, Monochron, etc. because it does not have the DTR/RTS wire necessary for initiating the bootloader reboot sequence. For that we suggest an FTDI cable or FTDI friend.
Downloads
Windows XP/Vista/7/8 or MacOS X PL2303HX.D drivers
PL2303HX.D datasheet
.END
USB FTDI TTL-232 cable - TTL-232R 3.3V
http://www.adafruit.com/products/70
This is a FTDI FT232RL usb/serial chip embedded in a cable that has a 6-pin socket at the end. These are perfect for use with a Boarduino, Meggy's, or other Arduino clones, and Fuzeboxen. Useful whenever you want to communicate with a TTL serial device, such as an XPort, GPS, XBee or SIM module through a breakout board.
The version we have is the 3.3V. The data signals are at 3V and the power line provides 5V. We suggest this for any product that needs FTDI cables. Because the cable is 5V compliant, you can use it with 3v or 5v logic just fine - no level shifting required!.
If you have a device that is running at 5V logic and requires 5V power, this cable will work fine.
If you want to tweak the voltages and signals a little, you should also check out the FTDI friend
You can download the drivers and datasheet direct from FTDI
How to Find Hidden COM Ports There, under a rock! Its a gaggle of COM ports!
http://www.adafruit.com/products/70#Learn
This mini tutorial will show you how you can find and uninstall all those extra COM ports you may have registered from years of microcontroller-hacking.
You may have noticed that every time a new FTDI-based board is plugged in, you get a new COM port. You might also get new COM port assignment with adapters, etc. Eventually you can get into pretty high COM port numbers and that can be really annoying! For example, on my 6-month old Windows 7 install I'm already up to COM38!
At some point you may want to figure out what were all those other COM ports and perhaps uninstall the "ghost" devices. Under windows this isn't particularly easy unless you know how. Luckily, this tutorial will show you how and its really easy once you know!
First up, you'll have to open up a Command Prompt and in Windows 7 it has to be run as administrator. Open up the start menu and start typing in "Command" until the black C:\ icon appears. Right click and select Run as Administrator If you have some other version of Windows, you may not have to run as admin.
Now type in set devmgr_show_nonpresent_devices=1 (which is the magic command to show ghost devices) followed by start devmgmt.msc (which starts up the device manager)
Now you're almost done, select Show hidden devices from the View menu
Voila! You can now see every COM port you've ever made, and you can also now select which ones you want to uninstall so the COM port number can be recycled
USB to Serial Cable
http://item.taobao.com/item.htm?spm=a230r.1.0.201.lNNxlZ&id=10346178579
简介
USB to Serial是一款小型的USB转TTL电平信号的转接板。集成了CP2103芯片，有用体积小，低价好用等特点。可直接插入USB host接口使用。
这款USB to TTL转换板的接口兼容APC220无线数传、蓝牙无线数传模块，也可以用于STC单片机程序下载或者其他USB转TTL的串口通讯场合。
技术规格
USB端口供电：5v
硬件接口：支持USB 2.0接口，最高速度12Mbps
UART接口支持5-8bit数据位，1-2停止位，奇偶校验位和无校验
集成EEPROM，提供Vendor ID，product ID，串口号以及版本号
板载LED状态指示灯
支持Windows, MAC(OSX-9以上版本) and Linux(2.4 kernel以上版本)操作系统
兼容Bluetooth V3和APC220直插通讯接口
支持对STC单片机程序下载
尺寸：38x18mm
配送清单
USB to Serial 1块
相关下载：
驱动程序
CP2103芯片数据手册
CP2103芯片驱动(Windows)
USB转串口线(九针)USB TO RS232转换器 9针串口转换线
http://item.taobao.com/item.htm?spm=a230r.1.0.221.lNNxlZ&id=15337481663
通用串行总线RS 232串行电缆，让你连接串口设备到您的电脑笔记本电脑或台式计算机通过通用串行总线端口，好像电脑提供了一个机载db9m连接器。它可能是一个成本效益的解决方案，桥梁之间的差距的兼容性现代计算机和传统串行外围。
规格：
简单的安装和操作提供了强大的串行连接到传统个人电脑
拔电源总线的省麻烦携带的外部电源适配器，该附加串口
广泛名单兼容操作系统使该装置适合几乎任何RS 232应用
通用串行总线RS 232串口适配器直通
易于安装和安装
Description:
The USB to RS232 Serial Cable lets you connect RS232 serial devices to your PC laptop or desktop computer through a USB port, as though the computer offered an onboard DB9M connector. It may be a cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals.
Specifications:
Simple installation and operation provides robust serial connectivity to legacy PCs
Drawing power from the USB bus saves the hassle of carrying an external power adapter for this add-on serial port
Extensive list of compatible operating systems makes this device perfect for almost any RS232 application
USB to Straight-Through RS232 Serial Adapter
Easy to setup and install
USB转TTL 3.3V PL2303 可用于蓝牙模块调试板 USB to UART串口线
http://item.taobao.com/item.htm?spm=a230r.1.14.37.Ti4U3O&id=22143428289
USB转TTL小板
送4根杜邦线,用于连接蓝牙模块和USB转TTL小板。
蓝色版/绿色版随机发
一、资料
资料下载地址：
http://www.modiatek.com/down/html/?10.html
注意：淘宝不支持外链接，需要拷贝上述网址到地址栏回车后才能下载；
二、连线顺序
蓝牙通信只需要接3根杜邦线：GND RXD TXD，不需要接VCC；但蓝牙芯片本身工作需要外部供给3.3V VCC电源。
TTL小板 蓝牙模块
3.3V<===>VCC
RXD<===>UART-TX
TXD<===>UART-RX
GND<===>GND
注：有关电平匹配解释，本商品UART接口既可以接3.3V，也可以接5V的，不会用的，用什么表量下来说什么不匹配的评价，不要乱写。不专业的，请联络我们技术支持。
三、发货清单
1、USB-TTL模块 1块
2、杜邦线 4条
3、驱动、测试软件 提供网址下载
五、产品应用和特点
产品应用:
1.各种无线串行透明传输
2.各种行业无线数据传输
3.各种蓝牙SPP通信要求与PC通信，TTL接蓝牙，PC接USB
4.电子爱好者可以用到的USB信号转TTL信号 与蓝牙相连
4.蓝牙模块AT命令修改模块名称，模块密码等。
产品特点:
4.预留3.3V与5V插针接口，方便蓝牙模块直接取电---本条暂不支持，开发中。
2.接口排针与板子平行，而非与板子成垂直安装，方便刷机时引出杜邦线
六、相关问题
针对买家常关心的问题，本店做了总结，归纳为以下几点，请您耐心看完：
1、小板支持win7系统么？
答：usb转ttl的小板支持win7系统的，本店提供的驱动程序有直接在WIN7下测试通过。
3、你的小板为什么联机没反应？
答：首先本店保证每一块小板都经过测试没问题才发货，店主要求客户收到小板后严格按本店介绍的小板测试方法先测试，确定没问题再进行刷机。“为什么联机没反应”基本上都是新手的提问，涉及到端口（com口）的设置、端口的选择、软件参数的设置、数据的正确性以及机器的好坏，请买家先耐心找寻原因。
八、应用举例--单片机与蓝牙传输连接演示
下图使用TTL模块给蓝牙主从模块连接传递数据给单片机演示。
(图中蓝牙模块需要另买，点击上面蓝牙模块链接一并购买即可)。
.END
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