4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard USB Cable Pull down resistors keep motors

Pull down resistors keep motors disabled during power-up

Built-in charging socket i

power indicator LED and an adjustable sensitivity though a potentiometer

1 A MAX Locked-rotor Current ≤1

An IR blocking filter

4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard USB Cable Pull down resistors keep motorsThis Matrix Keypad 3 X 4 has 12 buttons, arranged in a telephone line 3x4 grid. The keys are connected into a matrix,hence only 7 microcontroller pins (3 columns and 4 rows) are required to scan the pad. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 7 microcontroller pins (3 columns and 4 rows) to scan