pongWiz wrote:i am thinking about building a bracelet that contains a couple led that light up whenever i have a text message or any other type of message. i have a teensy board that is pretty small and i was thinking about connecting the board to a bluetooth dongle. problem is i havent done enough research on the dongle and dont know if it is going to work as planned.
If I were you I would let the IOIO board take care of all your problems:https://www.sparkfun.com/products/10748
1. The on board PIC is already programmed to work with an Android device.
2. It is also ready to work with most (probably not all) USB bluetooth dongles. Most of which can be had for well below $10.
3. It is also ready to connect to just about anything (i.e. digital out, in and analog in).
4. On the android side, I am lead to believe there is a "grocery list" of methods waiting to be called. I believe the author was attempting to make Android programming for the IOIO as easy as C programming for the Arduino.
...I can see not only creating a vibrating bracelet, but adding, maybe, an OLED to display numbers.
Of course this is not cost effective. As UAirLtd pointed out you can buy a bracelet with a display for under $50. Where as the IOIO board will cost $50 plus you will have to spend a few more dollars on the USB Bluetooth dongle. Not to mention, you still need a way to generate the 5V expected by the USB Bluetooth dongle and IOIO board.
Ah! The portability (not bracelet) power problem has been solved!:http://www.adafruit.com/products/885
...and you can probably hide the vibrating motor in the metal tin as well!
Edit: added later
I just noticed the Adafruit version includes a bluetooth dongle. So, from what I understand, all you would need to do is add a vibrating motor that can be controlled by the PIC. So, maybe, to be safe, you would add a circuit to drive the motor to go between the PIC and the motor.