# USB Drivers

If you are using a Parallax board with a USB connector, or a Parallax USB to Serial Adapter:

...or...

...you will need USB drivers from Parallax Inc.

- Beware of non-Parallax USB to Serial Adapters : Not every brand of USB to Serial Adapter supports the timing precision needed for BASIC Stamp programming. Some known-incompatible brands are Belkin and Gigaware. Keyspan #USA19-HS is known to be compatible. You can order an inexpensive Parallax USB to Serial Adapter (#28030) from www.parallax.com.
- Unplug the USB cable to your BASIC Stamp development board at the computer.
- Download and install the latest version of the USB drivers from Parallax: www.parallax.com/usbdrivers.
- Reconnect the USB cable and your BASIC Stamp development board. You should see a series of messages in your system tray:

... ...

- If you don't see any of these messages, open your computer's Ports list to confirm that the drivers were installed properly.

Finding your Ports List in your computer's Device Manager

- Windows 2K : Start Menu > Settings > Control Panel > System > click Hardware Tab > Device Manager... > expand Ports (COM & LPT)
- Windows XP : Start Menu > right-click My Computer > Properties > click Hardware Tab > Device Manager > expand Ports (COM & LPT)
- Windows Vista or Windows 7 : Start Menu (Windows icon) > right-click Computer > Properties > Device Manager (left pane) > expand Ports (COM & LPT)

- If there is no yellow exclamation mark (like the image below), the drivers have been installed correctly and you can now go try the Run/Identify Test again.

- There will be a yellow exclamation mark (!) by the device if the drivers either were not installed successfully or not at all. Contact Parallax Tech Support for assistance.

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BASIC Stamp Help Version 2.5.4

Copyright © Parallax Inc.

8/8/2012