Pololu 391 - Pololu USB-to-Serial Adapter
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  • Pololu 391 - Pololu USB-to-Serial Adapter
ID: 195491
63,27 zł
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51,44 zł Netto

Pololu USB-to-Serial Adapter
6 tyg.
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Pololu USB-to-Serial Adapter

The Pololu USB-to-serial adapter is a tiny unit that makes it easy to connect a microcontroller project to a PC. You can connect the adapter directly to a microcontroller without an RS-232-to-TTL level converter. It is USB 2.0-compatible and will work with your existing programs that interface with a serial port.


The Pololu USB-to-serial adapter is great for connecting microcontroller projects to a personal computer. The adapter uses 3.3 V signal levels so you can connect it directly to any microcontroller running at up to 5 V without the hassle of an RS-232-to-TTL level converter. The tiny unit is only 1.0" x 0.65" including its mini-B connector, and the simple layout of the ground, transmit, and receive lines allows for easy mounting that takes up as little as four breadboard rows.

The USB adapter’s drivers make it look like a standard serial port to the operating system, allowing you to connect to all of your existing software, such as servo controller interface programs, through a USB port. The adapter is compatible with USB 2.0 standards and allows baud rates of up to 921.6 kbps. Drivers are available for Windows 98 through Vista, Linux, and Mac OSX.

With the trend toward removing serial ports from new computers, the Pololu USB-to-serial adapter provides one of the most economical, small, and simple solutions to the common problem of interfacing small projects to PCs.

Note: This product does not include printed documentation or software discs. The Pololu USB-to-serial adapter requires software drivers to operate; please see the resources tab for more information. This product requires a USB A to mini-B cable (not included) to connect to a computer.

Device specifications

  • PCB size: 1.0" x 0.65" including connector
  • USB standard: USB 2.0 (full speed)
  • Connector: USB mini-B
  • Data I/O voltage levels: 3.3 V (5 V tolerant)
  • Maximum data rate: 921.6 kbps
  • Supply current: 25 mA


Module pinout

Pin Type Function
DCD In "Data carrier detect" control input (active low)
DTR Out "Data terminal ready" control output (active low)
(often used with DSR)
DSR In "Data set ready" control input (active low)
(often used with DTR)
RTS Out "Ready to send" control output
(often used with CTS)
CTS In "Clear to send" control input
(often used with RTS)
GND Power Ground
TX Out Asynchronous serial data transmit (idle high)
VBUS Power USB bus voltage (+5V)
RX In Asynchronous serial data receive
SUSPEND Out Driven high when in USB suspend state
SUSPEND Out Driven low when in USB suspend state
RST In Device reset
RI In "Ring indicator" control input (active low)
VDD Power 3.3 V voltage regulator output

Typical connection

To connect a serial device to your computer’s USB port, you will most likely only need to use the GND, TX, and RX lines. The TX and RX lines use 3.3-volt levels, but the USB adapter input lines will tolerate up to 5.5 volts. Therefore, a direct connection to a microcontroller’s I/O lines is usually possible.

For some programs, it will be necessary to connect the handshaking lines (RTS, CTS, etc.) if the software does not establish a connection without those lines. In general, the handshaking lines can be left disconnected, used for their intended purpose, or used as additional I/O lines to the computer.

People often buy this product together with:

USB Cable A to Mini-B 6 ft. USB Cable A to Mini-B 6 ft.
195491

Osoba odpowiedzialna BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Polska sprzedaz@kamami.pl 22 767 36 20

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