UPC 712121377014

I believe many people have seen recently a touch keyboard Makey makey analog video, the video circuit board can be connected to any conductive body by touching a conductive body go to the computer keyboard events. Play a variety of games or effects.The principle which is through a keyboard microcontroller simulation, leads a few keys, and using the touch form instead of the switch. Now we use an arduino plus Touch key USB Shield, also be able to achieve this effect out.Touch key USB Shield as an input method using a touch, dual touch contact switch, the touch terminal and the ground terminal leads connected to the two touch electrodes, when people touch the two poles, because the relationship between the resistance of the body, two touch there is a certain current flows between the electrodes, by detecting the current size of the touch event can be detected. This method Makey virtual keyboard is used.