4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard Raindrops and the 120:1 plastic gearmotors

and the 120:1 plastic gearmotors produce roughly 75 oz-in of torque at 6 V

all of the micro metal gearmotors have the same physical dimensions (though the terminal size and separation on the HPCB versions differ slightly from the other versions)

Hard anodized finish

Rotational Degree 180

5ms pulse) is middle

4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard Raindrops and the 120:1 plastic gearmotorsThis 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