Converter (USB to TTL etc)
5V-3V 4 Channel Level Converter Module (for UART/IIC/1-WIRE/SPI)
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Item Description: 

Four MOS tube: four channel, two-way discussion 3V, and 5V 

The power contribution with hostile to invert assurance coordinated 3.3VLDO, and give current under 150mA 

With power show 

Utilized for UART/IIC/1-WIRE/SPI

USB to TTL UART CP2102 Module with DTR pin
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This is a redesigned CP2102 module, fully compatible with arduino pro mini, why? because all the pins are same as our FTDI basic board, and most important is the DTR pin enabled as FTDI, so you can directly upload sketch with this one.

So what is the advantage? The price is almost only one third of the FTDI basic. Meanwhile, all the pins of CP2102 are brought out, so you can free to use them all for other cases.

Features:

  • Use SILABS’s CP2102 chip, performance is definitely more than made PL2303, encroaching FT232RL.
  • Full board design, full-featured interface. With RXD TXD RST 3.3V 5V DTR DCD RI RTS CTS and other full-featured interface. Some boards can’t work with normal CP2102 boards because of the incomplete interface, now it is not a problem anymore.
  • With 500mA resettable fuse designed to prevent users from burning power pick the wrong computer USB, this is a must. Get hold of the plate board computer motherboard burned more harm than good.
  • With power indicator light.
  • Directly computer USB interface design, you can not use the computer switch wiring or extension cords.
  • Package includes five DuPont line, you can link directly target board. Convenient and flexible.
  • Transmission speed 115200bps easily qualified, definitely more than PL2303.
  • Borrow computer USB power supply, 3.3V and 5V power output can be provided directly to the user’s target board.
  • Note: RXD TXD Some devices mark is not standard, even if not directly, please cross-connect.

Documentation:

Drivers Can be easy download from Google.

MAX3232 RS232 Serial port to TTL Converter Module with DB9 Connector
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Description:

  • Weight:16 g 
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  • Shading: as picture appear 
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  • Size:27mmx30mm/1.06"x1.18"(inch) (approx) 
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  • Working Voltage: 3V-5V 
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  • MAX3232 Chip 
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  • Stick definition: GND, RXD,TXD,VCC,+5V 
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  • Pitch:2.54mm 
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  • Cable:21cm (counting 2 ports) 
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  • The extent of utilization: 
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  • 1. can be utilized to compose a wide range of SCM, for example, STM32, NXP, STC, Renesas and so forth... 
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  • 2. the radio, cell phone brush machine adjustment, brush XBOX360, GPS, vehicle investigation, brush DVD, hard circle fix, overhauling set-top box. 
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  • Update: 
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  • At the point when utilizing the plate, must be VCC outer 3.3V or 5V control supply, control LED lights on, the module will work! No outside power supply, LED light isn't splendid, the module won't work. 
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  • Note: Due to the distinction between various screens, the image may not mirror the real shade of the thing. Much obliged to you!
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FT232RL USB to Serial Adapter Module USB TO UART (Economy)
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Description:
Use FT232RL chip;
Draw out all signal port of FT232RL chip;
RXD/TXD transceiver communication indicator;
USB power supply, can choose 5V or 3.3V ,set by jumper.
Each module has been tested
Can use for Arduino Pro Min.

 
Package Included: 
1 X FT232RL Module
1 X 6P Pin

XBee Explorer Dongle (Adapter/Explorer/Programmer) FT232RL with USB cable
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Features:

Bee Adapter V1.2 is a compact USB to serial adapter equipped with BEE (20pin 2.0mm) sockets. With integrated  FT232RL IC, It can be used for programming or communicating with board which basic Arduino but without USB  interface, like Sniffer Nano. On the other hand, you may connect your PC to various wireless applications via the BEE  compatible modules.

 

Features

Bee Adapter is a compact USB to serial adapter equipped with BEE (20pin 2.0mm) sockets. With integrated FT232RL IC, It can be used for programming or communicating with board which basic Arduino but without USB interface, like Sniffer Nano. On the other hand, you may connect your PC to various wireless applications via the BEE compatible modules. 
The Adapter also could support XBee interface. 

Specification
3.3V and 5V dual power output 
3.3V and 5V IO compatible 
USB 2.0 protocol 
BitBang mode ready 
Easily connected to a PC via mini USB cable 
XBee-setting support software X-CTU
Usage 1: PC via a USB cable directly connected with XBee adapters
Usage 2: Xbee/Bluetooth Bee configure or use as a data-transmission
Uses 3: ARDUINO BOARD PRO MINI Downloader
Documents: Schematic

Shipping List:
1PCS*Xbee Adapter FT232RL

FT232RL usb to serial (usb-serial) converter module
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Depiction: Very minimal effort approach to add USB capacity to an Arduino or other microcontrollers. Use to give your very own breadboard Arduino USB capacity for bootloading or downloading portrays. Note: this board incorporates a DTR stick expected to auto-reset Arduino when downloading to your gadget. 

Item Description: Very minimal effort approach to adding USB capacity to an Arduino or another microcontroller. Use to give your own breadboard Arduino USB capacity for bootloading or downloading portrays. Note: this board incorporates a DTR stick expected to auto-reset Arduino when downloading to your gadget. Utilize FT232RL chip Draw out all flag port of FT232RL chip RXD/TXD handset correspondence marker USB control supply can be set to 5V or 3.3V, set by patch cushion Includes over-current insurance, utilizing a 500ma self-reestablishing wire Use new plan,converte USB into sequential port.

MAX485 Module RS-485 to TTL Converter Module
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Features MAX485 chipset; 5.08mm pitch, 2-pin terminals for RS-485 easy communication and wiring
Specification Working voltage: 5V
Application Great for DIY project

 

PL2303, USB to RS232 TTL Converter Module
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Item Features: 

Utilizing PL2303hx 

Bolster windows 8 

Backings three power modes: 5V outer power supply; 3.3V outside power supply; remotely controlled (requires 3.3V-5V) 

With 3 LED: TXD LED, RXD LED, POWER LED 

Applications: 

RS-232 to USB update conventional gadgets 

USB to RS-232 sequential connector 

Guidelines for use: (to get to the MCU for instance) 

VCCIO: Output 3.3V or 5V (USB-controlled module bounce, jumper will 3.3V or 5V) 

GND: GND association 

TXD: pick MCU.RX (flag stream: MCU.RX << PL2303 << PC.TX) 

RXD: pick MCU.TX (flag stream: MCU.TX >> PL2303 >> PC.RX)

IIC I2C Logic Level Converter Bi-Directional Module 5V to 3.3V
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f you've ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. The SparkFun logic level converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V.

This level converter also works with 2.8V and 1.8V devices. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side. Two inputs and two outputs are provided for each side.

Bread board friendly! Can be used with normal serial, I2C, SPI, and any other digital signal. Does not work with an analog signal.
The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the 'HV' pin, low voltage (2.8V for example) to 'LV', and ground from the system to the 'GND' pin.
Pins are labeled as Inputs and Outputs. These are relative to the board. A digital one going into the RXI pin on the 5V side will show up on the RXO pin on the 3.3V side as 3.3V. A digital one going into the TXI pin on the 3.3V side will show up on the TXO pin on the 5V side as 5V.

Male A-USB to DIP Pinboard 4-Pin 2.54 2.54mm
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Description: 
At present, mobile phone charger is everywhere, this module is used to convert the charger or computer USB port for conventional DIP2.54mm pin, a great convenience for your application

Package Included:
1 X Male A-USB to DIP Pinboard

FTDI Cable 5V VCC-3.3V I/O
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Description: The FTDI cable is a USB to Serial (TTL level) converter which allows for a simple way to connect TTL interface devices to USB. The VCC pins of this FTDI cable are configured to operate at 5V with 3.3V I/O.

The FTDI cable is designed around an FT232RQ, which is housed in a USB A connector. The other side of the cable is terminated with a 0.1" pitch, 6-pin connector with the following pinout: RTS, RX, TX, 5V, CTS, GND (RTS is the green cable and GND is black).

This cable has almost the same pinout and functionality as our FTDI Basic Breakout board; you can use it to program your Arduino ProPro Mini and Lilypad, etc. For use with those boards, align the black and green wires of the FTDI cable with the ‘BLK’ and ‘GRN’ labels on the PCB. The difference between this cable and the FTDI Basic Breakout is the cable has a 5V Vcc where as the breakout has a 3.3V Vcc. You will still be able to program an Aruidno Pro, Pro Mini, Lilypad, etc. The 5V Vcc supply will not damage these Arduino circuit boards.

Originally, the cable was designed to have 3.3V VCC, however something was lost in translation between SparkFun and our supplier and we got stuck with a whole bunch of FTDI cables that have a slight mix up in wiring. These have 5V VCC, and 3.3V I/O. The 5V Vcc output shouldn’t be a problem unless this cable is being used to power a sensitive circuit such as a sensor.

There are pros and cons to the FTDI Cable vs the FTDI Basic. The FTDI Basic has great LED indicators, but requires a Mini-B cable. The FTDI Cable is well protected against the elements, but is large and cannot be embedded into a project as easily. The FTDI Basic uses DTR to cause a hardware reset where the FTDI cable uses the RTS signal.

Documents:

Source: SparkFun

- See more at: http://www.ewallpk.com/cableusbttlconvertor/635-ftdi-cable-5v-vcc-33v-io.html#sthash.LCQVy6VL.dpuf