KP-202 3x4 Matrix Flat Keypad, 12 Keys, Grade B
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Prices updated: 12 Oct 2026
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About this product
The KP-202 is a 3x4 matrix keypad with 12 keys in a flat format, listed as Grade B. Like other matrix keypads, it is wired in rows and columns, so seven microcontroller pins can read all twelve keys. It suits numeric input and simple control panels in hobby and student projects.
Specifications
- Matrix layout
- 3 x 4
- Number of keys
- 12
- Form factor
- Flat
- Grade
- Grade B
- Microcontroller pins required
- 7 (4 rows + 3 columns)
Frequently asked questions
How many pins does it need on a microcontroller?
Seven: four row lines and three column lines. Use a continuity test with a multimeter to map each connection to its row or column before wiring.
Can I use the same code as for a PCB keypad?
Yes, if the layout is the same 3x4 matrix. Keypad libraries such as Keypad for Arduino work with the row and column pins you define, so only the pin assignments need to change.
