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You can only test ONE CABLE at a time

====== Step 1 - CHIP TEST ======

Plug in the cable into your computer (we will use Windows)

Go to the Device Manager (From the **Start Menu**, select **Settings->Control Panel**. Double click on **System** and select the **Hardware** tab. Then click on the **Device Manager** button) 

{{http://www.ladyada.net/images/arduino/devicemanager.jpg}}

When plugging in a USB cable, the window will refresh and you will see **USB Serial Port (COMx)** 

If the new COM port doesn't show up, there is a problem with the cable

====== Step 2 - VOLTAGE TEST ======

This is the end of your FTDI Cable

{{:ftdi:ftdiend.jpg?500|}}

We added breakout wires to make it easy to measure voltages

{{:ftdi:breakoutiwre.jpg?500|}}

Test voltage between black and red wires - it must be 5V

{{:ftdi:5vtest.jpg|}}

Test voltage between black and orange wires - it must be 3.3V

{{:ftdi:vcciotest.jpg|}}

====== Communication test ======

Download X-CTU: http://ftp1.digi.com/support/utilities/40002637_c.exe
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