Touch key USB Shield Expansion Board Analog Touch Keyboard Keypad for Arduino
7,57 €
Description : The keyboard,in fact, is simulated by a microcontroller and several keys are lead out accordingly. In addition, traditional switches are replaced by touch mode. We can reproduce what the video shows only by arduino and Touch key USB Shield. This touch key USB Shield adopts touch mode as input method and is set with double-contact touch switch. The touch port and GND have been lead out and connected to two touching electrodes, so when you touch these two electrodes, there will be a certain amount of electric current pass through due to body resistance. We can detect the touch event by inspecting the amount of such electric current. While Makey analog keyboard works in the same way.
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