I2C Tastatur Rucksack Board I2C Keypad Modul 4 x 4 Matrix Array 4 Pin Buchse Jump
14,30 €
The keypads need to be a “matrix” style keypad, where there is one pin for each row and one pin for each column of keys. For example, a keypad with 4 rows of keys and three columns of keys will have 7 pins on it.
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