- Published: Saturday, 03 April 2010
- Written by Graham Mitchell
EM4100 readers are somewhat popular because they are cheap, widely available and easy to use. You can pick up an EM4100 RFID reader for ~$40 or less. The module used in this example may not work for every EM Reader out there - though it offers an approach to start with. If you do create a new module for a different device, then please share it here at digital-diy.comDiscuss this article in the forums (0 replies).