4×3 Membrane Matrix Keypad for Arduino

The Keypad 4×3 features a total of 12 buttons in Matrix form. Consider 4 rows as input and 3 columns as output. Each switch is connected from one side to a row and from the other side to a column. For example, if we press switch number 1, the input of this row is saved at the output of its column. The image below shows the internal circuit of this keyboard.

Specifications

• Type: Matrix keypad
• Layout Options:
  • 4×4 (16 keys arranged in a 4-row by 4-column matrix)
  • 4×3 (12 keys arranged in a 4-row by 3-column matrix)
• Key Style: Tactile membrane buttons
• Key Color: Black
• Key Labeling: Standard alphanumeric (0-9), *, # for 4×3 layout; additional A, B, C, D for 4×4 layout.