Glow LED

To glow two leds and communicate with two XBee wirelessly, Vikram and I , as a pair, made two circuits with two Arduinos. For circuit, XBee needs 3.3V power. We used the code that Rob posted on the class site. code is HERE.
We used the code and made it works by changing address in the code for each one.

Find & Fix

As a Find & Fix project, I made an indicator. I found the problem that sometimes there is no water and no person to change an empty bottle of water in the right hall at ITP because all bottles of water are in man's room. Therefore, this is the prototype.
Actually, It is supposed to be drained little by little away but because I couldn't make a water cooler, I will pour some water into a cup to measure how much water left in a bottle.

Led is supposed to be blinked when there is no water in a cup to indicate no water and to encourage to change a bottle.


For more pressure, I put a this kind of shape of wood block on a pressure sensor.


To measure how much water left in a bottle, I used a seven segment. From 4 to 0 the number of sign will be shown.