Funduino Makey Touch Key USB SHIELD Analog Touch Keyboard for Arduino
Touch key USB shields with Touch as input method which adopts double contact of the Touch switch will Touch the client and server-side derivation connected to two electrodes Touch Touch two pole because of the human body resistance the Touch between the electrodes is to some extent current flows through the size can be detected by measuring the current Touch events. Makey's virtual keyboard is also use this method.