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4PCS 3x4 Matrix Keypad 12 Keyboard Module External Keypad Board for Microcontroller (12Key)

4.5 (1) Write Review
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$14.49

$ 6 .99 $6.99

In Stock

About this item

  • It provides numbers from 0 to 9, as well as standard stars (*) and hash symbols (#)
  • Keypad is a combination of row and column circuits.
  • The keyboard matrix allows you to quickly add controls to your electronic projects. Easy to communicate with any microcontroller.
  • There is a switch connecting each row and column. So the combinations of rows and columns makes up the 12 inputs.
  • Application: Password security system, Generating external interrupt, Automatic Gate Keypad Lock.


4x3 12 button matrix keyboard module
It provides numbers from 0 to 9, as well as standard stars (*) and hash symbols (#)
The keyboard matrix allows you to quickly add controls to your electronic projects.
Easy to communicate with any microcontroller.
Size: 7*5*1cm
Weight: 19g
Keypad Number: 12keys
3X4 design, 10 numeric keys, 2 function keys.
1st row 1 2 3
2nd row 4 5 6
3rd row 7 8 9
4th row * 0 #

Package Included :
4 x 12 keys keypad


Robert G. Schumacher Jr.
Reviewed in the United States on January 5, 2025
The quality of the keypad seems OK, both electrical and mechanical. The pinout provided is incorrect. I provided an image of a conventional membrane keypad with pinout, and the pinout of this keypad. Need to switch wires around to replace the membrane in my Arduino design. If the image doesn't work out, the pinout is as follows (facing front of keypad) NC C2 R1 C1 R4 C3 R3 R2 NC. Not sure what the schematic in the description is for.