Home > Arduino & SCM Supplies > 4-Key
4-Key Button Module Sensor External Keyboard Module for Arduino - Blue
When module has detected a key pressed£¬ the corresponding port will output low level signal; Each button is with 4.7Kohm resistance to prevent wrong operation or external interference; Separate key size: 12mm x 12mm x 5mm£¬ convenient to operate; Power supply voltage input range: 3~6V DC; With LED indicator£¬ it will light up after being powered on.