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 Notice: This page contains information for the legacy Phidget21 Library. Phidget21 is out of support. Bugfixes may be considered on a case by case basis. Phidget21 does not support VINT Phidgets, or new USB Phidgets released after 2020. We maintain a selection of legacy devices for sale that are supported in Phidget21. We recommend that new projects be developed against the Phidget22 Library. 
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From Phidgets Legacy Support
																
																								Make sure you have the current version of the Phidget library installed on your PC. If you don't, follow these steps:
- Go to the Quick Downloads section on the Windows page
 - Download and run the Phidget21 Installer (32-bit, or 64-bit, depending on your system)
 - You should see the 
 icon on the right hand corner of the Task Bar.