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Item 1

This is a basic breakout board for the FTDI FT232RL USB to serial IC. The pinout of this board matches the FTDI cable to work with official Arduino and cloned 5V Arduino boards. It can also be used for general serial applications. The major difference with this board is that it brings out the DTR pin as opposed to the RTS pin of the FTDI cable. The DTR pin allows an Arduino target to auto-reset when a new Sketch is downloaded. This is a really nice feature to have and allows a sketch to be downloaded without having to hit the reset button. This board will auto reset any Arduino board that has the reset pin brought out to a 6-pin connector.It is designed to decrease the cost of Arduino development and increase ease of use (the auto-reset feature rocks!).And it has TX and RX LEDs that make it a bit better to use over the FTDI cable. You can actually see serial traffic on the LEDs to verify if the board is working.
The pins labeled BLK and GRN correspond to the colored wires on the FTDI cable. The black wire on the FTDI cable is GND, green is CTS. Use these BLK and GRN pins to align the FTDI basic board with your Arduino target.

Features:
100% Brand new and high quality
Use a 6-pin header on the bottom, which makes it smaller and more compact
Support 3.3V, 5V
Chipset FT232RL
USB power has over current protection, using 500MA self-restore fuse
RXD/TXD transceiver communication indicator
Pin definition: DTR,RTS,BLK,GRN,GND
Module size:Approx.3.1* 1.75cm/1.22 * 0.68inch
Interface: USB2.0
Package Included: 1 x FT232RL Module
Note:This board has a jumper on the back of the board that allows the board to be configured to either 3.3V or 5V (both power output and IO level). This board ship default to 5V, but you can cut the default trace and add a solder jumper if you need to switch to 3.3V.

Item 2

The FT232R is a USB to serial UART interface

A low-cost way to add USB capability to Arduino or other microcontrollers. Use this to give your own breadboard Arduino USB capability for bootloading or downloading sketches.

FTDI FT232RL USB to TTL Serial Converter Adapter Module 5V and 3.3V For Arduino

RXD/TXD transceiver communication indicator

Includes over-current protection, using a 500ma self-restoring fuse

This board includes a DTR pin needed to auto-reset Arduino when downloading to your device.

Specifications:

Color: Red

USB Power Supply: 3.3V or 5V

Size:43*17mm

Package Included:1*USB to TTL converter

Item 3

100% Brand new and high quality!
A low-cost way to add USB capability to for Arduino or other microcontrollers.
Use this to give your own breadboard for Arduino USB capability for bootloading or downloading sketches.
Specifications:
Size: approx. 35 x 17mm
Net Weight: 3g
Package includes:1 x Basic Breakout Board

Item 4

Standard: USB2.0 standard, backward compatible, in line with the standard RS485
Direction control: the use of automatic data flow control, auto distinguish and control data transfer direction
Baud :300-9216000bps, automatically detecting the serial signal data rate
Load capacity: support multipoint, each converter allows RS485 interface device to connect 32
Interface Protection: TVS tube protection, USB self-recovery protection
Support Windows98/ME/2000/XP/WIN7/Vista, Linux, Mac
Support devices with RS485 interface: surveillance cameras, video capture device, fingerprint attendance machine, PBX, CNC machine, microcontroller, etc.

This converter provides two way serial communications signal
conversion between the RS485
to and from a personal computer USB port
using virtual serial COM port.
Self-powered from USB
FT232RL+75176

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