title: Long Range RFiD Reading
body: <p>I'm trying to set up a practical DIY method of unlocking a garage or front door by coming into the range of a reader; even if that means standing in a specific line of sight. Essentially once I reach the garage, the ID is read and raises </p>
  
  <p>I'd prefer to have passive ID's, but the reader itself would be able to have a fixed power source that doesn't need to be changed. </p>
  
  <p>I've done a lot of searching on google and there <em>are</em> RFiD scanners that read cars to open tolls booths, but those are commercial grade products and much more expensive than anything I'm trying to make. Should I continue looking into RFiD's, or is there a more efficient method of approaching this?</p>
  
  <p>Also, if my tags are active, and powerful enough, would that compensate for a low frequency reader?</p>