In 2009 I put together a project called RFiDJ that used media tiles to queue media that I wanted to play from my HTPC (Home Theater PC). We had a lot of fun with the project but felt that the tether to the reader surface was too much of a limitation. In 2010 we decided to break the tether and make the reader surface wireless and portable. Since then we have found this project to much more interactive & entertaining. Of course we added a few features along the way. This is the RFiDJ Refresh.
This is the architecture we designed for this project. I'll use this diagram as a guide to document the project from left to right starting with the Media Tiles.
The media tiles are the same from the original project although they can be anything that can hide an RFID tag. The circular RFID tags I used are visible in this picture.
The reader uses a rechargeable lithium polymer battery back to power an RFID reader and the 433MHz transmitter.
Everything is enclosed in a small shadow box frame (thanks Ikea).
The assembled reader and media tiles.
The 433MHz receiver is powered by the FT232R UART to USB converter. It can be connected directly to the HTPC.
Not shown in the schematic is the LPC1114 that I added in between the 433MHz receiver and the FT232R. While not necessary, I added it to perform the data framing since the 433MHz is not a packet based radio.
Finally this is a second video that shows me opening up the reader with the receiver in the shot.
Note: You'll hear references to RF-AID in the videos but we decided to drop that name in favor of RFiDJ Refresh. What's in a name right?