The RFIDuino Login Project for Windows will allow you to use the RFIDuino system to log into Windows. You will need to load a special firmware onto your Geekduino/Arduino, and load the appropriate files onto your computer. Once setup, you can login to your computer from the main Windows Login screen by simply swiping your RFID tag across the RFIDuino antenna. This project will work with Windows Vista, 7, 8 and 10.
This project is an example project and should not be considered ready for production use where security is required. The user login/password are stored in an unencrypted plaintext file on the computer.
For this project, you're going to need an Arduino/Geekduino, The RFIDuino, a compatible USB cable, and an RFID Tag of some sort. All of these things are available on the Trossen Robotics Store in a convenient kit, but you can use your own Arduino and RFID tags if you wish to. We highly recommend using the Geekduino due to the use of the manual reset toggle switch that doesn't exist on many other Arduino variants. The rest of this instructable also assumes you will be using the RFIDuino shield and the related libraries.