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I'm looking to communicate with a circuit I have built on a breadboard. I would like to communicate using USB.

Can anyone suggest an item that I can use to accomplish this? Are their any other considerations I need to take into account? I would rather not have just stick the USB wires individually into breadboard sockets.

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    \$\begingroup\$ Huh? What are you asking? How did you make a circuit board via USB? What type of USB are you looking for, just a connector (if so what type of connector), USB to serial, what? \$\endgroup\$
    – Kellenjb
    Jun 21, 2012 at 1:04

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If you have a USB transceiver already on the breadboard and you just need to connect USB somehow, they make little breadboard adaptors like the one pictured below:

enter image description here

You can find these things buy Googling "USB breadboard adapter." An example is here.

If on the other hand you do not have a USB transceiver and would like to communicate with your circuit by a UART port, then you need a similar item, but with a USB to UART converter chip:

enter image description here

To find items like this, Google for USB FTDI Breakout board. An example is shown here. After installing the FTDI Virtual COM Port driver this type or board will show up as a COM port on your computer.

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    \$\begingroup\$ Good answer. Seems to cover the two most probable question lines clearly and well. \$\endgroup\$
    – Russell McMahon
    Jun 21, 2012 at 6:51
  • \$\begingroup\$ In case anyone finds it useful; here is a bare-bones tutorial for using the FTDI virtual com port with a PIC18F2520. ugw.name/?page_id=140 \$\endgroup\$ Jun 28, 2013 at 18:24
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I can think of two low level ways to communicate with a circuit - digital (either something is on or off) or analog (what voltage is at specific point). To acomplish these tasks you need a microcontroller. Microcontroller is a very small computer on a chip that has means to communicate to circuit and to humans.

As i understand, you are not experienced in electronics very much, so i'd suggest an Arduino board - it's a board with microcontroller and other stuff that makes it easy to use.

There are some FTDI chips as suggested by justin, that can do digital communication too, there are loads of other microcontrollers and development boards, but arduino in general is the most friendly to beginners.

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There are lots of usb bridge devices available here is an example of one that handles just about everything though you can get cheaper devices for specific protocols.

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