Oscilloscope (오실로스코프)

ver 1.3 new functions
- using SurfaceView class
- added peripheral device menu
- added help menu


fuction
1. adjust time division
2. adjust voltage division
3. adjust raito of voltage
you can adjust voltage ratio according to devices
because they are different from each other with audio input level
4. run/stop : if you want to stop waveform, you can do it ver 1.3 new functions
    - Using SurfaceView class
    - Added peripheral device menu
    - Added help menu


fuction
1. adjust time division
2. adjust voltage division
3. adjust raito of voltage
    you can adjust voltage ratio according to devices
    because they are different from each other with audio input level
4. run / stop: if you want to stop waveform, you can do it