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External buttons are buttons which can be connected to the Kniwwelino in addition to the buttons A and B already available on the board. Similarily as for the LEDs, those are connected through the pins on the outer area.

To work with external buttons, you need additional material: the buttons, as well as wire to create a closed circuit using the pins of the Kniwwelino.

With the Kniwwelino Blocks, you can then detect when current is flowing, i.e. when the button is pressed.

Connecting external buttons with silicon wire