Build the light sword with 3DP+Arduino(用3D列印+Arduino製作光劍)

    I used 3DP and arduino Nano to build the light sword.

There are 4 kind of LED blink modes.Just press buttom to change LED blink modes.
When you wave the sword, it can beep.

Using Android cell phone and Arduino + BT to control LED ON/OFF

    This is  a simple example to implement how to use android mobile phone to control LED ON/OFF thru Arduino +BT HC_05.


<Picture 1> This show the circuit design. I used the Arduino Digital Pin D2,D3 as  RX.TX signal.






<Picture2>  Using APP inventor 2 to create android APP .