4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard Standard Servo Size (L x W x

Size (L x W x H): Approx

driving ability

4 pins with 0

Integrated Wi-Fi MAC/ BB/RF/PA/LNA

depress the end to engage the vacuum

4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard Standard Servo Size (L x W xThis 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