RFID Bracelet

  • electronics

Description:

RFID Bracelet is a wearable device that can read RFID tags and send this information to your mobile phone. The purpose of the device is to inform a mobile application of the object the user has in his hand. These objects serve as the metaphor of the user's context and allow the application to recognize it and react to it in a meaningful way. For instance when the application knows the user's context it can supply him with relevant information. For more information about this, I suggest you read my master thesis (Dutch).

The RFID Bracelet consist of 5 major parts:

  1. Arduino Mini Pro: The Arduino is the microcontroller and serves as the brains of the device
  2. ID-20 RFID component: Reads and recognizes the RFID tags.
  3. BlueSmirf Gold Bluetooth component: Takes care of the connection with the mobile phone so the Arduino can push serial data to the mobile Phone.
  4. Vibe Board: This component gives feedback to the user when it recognizes an RFID tag by vibrating in multiple short bursts.
  5. ADXL330 Accelerometer: This could be used to perform gestures with certain objects.
  6. Some additional electronics such as a battery holder and voltage converter

One of the personal objectives for myself was that this bracelet should be elegant, not feel out of place while wearing it day in day out and be somewhat stylish. The first prototype was made from an old pair of jeans and was not much to look and very fragile. After that I started cutting out paperboard shapes for which I let myself be inspired by medical bracelets that support the wrist without limiting it's movement.

Although finding the right shape was relatively easy, making sure all the components fit as well was a long compromising process. Inside the bracelet there are two separated layers saving a lot of space for the components. The exterior top is made from a white leather and forms a protective shell around the electronics. The bottom part, touching the skin, is made from a soft fabric.

Roles:

  • Concept
  • Design
  • Building & soldering
  • Programming device
  • Programming mobile application

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