Ships within 48 hours · Estimated delivery Sep 15 - Sep 20
Relays terminals (COMMON
Per pin max current allowed is 40 mA
5ms pulse) is middle
Rotational Degree 180
Flyback diode to protect your microcontroller
4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard Raindrops Relays terminals (COMMONThis 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
US$ 297.50
US$ 49.00
US$ 49.00
US$ 147.50
US$ 147.50