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CJMCU 122 Capacitive Touch Keypad Module Header Pins:Without Soldered Pins Button closes when you push Transport System Button closes when you push it and opens when you release (momentary push button) The LilyPad Arduino consists of an ATmega328 with the Arduino bootloader and a minimum number of external components to keep it as small (and as simple) as possible This signals the MPR121 that something has touched a 'button' Size: approx The MPR121 capacitive keyboard uses the MPR121 and 12 touch sensitive pads to give a simple 'keyboard' with an output i2C The card also has four mounting holes that allows it to be used as an input system in place of the traditional buttons These keyboards function to measure the capacity of twelve points When an object approaches for the connector
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