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4 * 4 matrix keyboard microcontroller keyboard the empty PCB board with 16 keys easy to use and affordable external expansion
According to the views of the majority of Amoy Friends of improvement for this
| 1 | 2 | 3 | A |
| 4 | 5 | 6 | B |
| 7 | 8 | 9 | C |
| * | 0 | # | D |
4 × 4 matrix membrane keyboard
8P DuPont head, pitch 2.54mm, can be inserted in the Pin connection circuit; Peel off the white sticker on the back of the keyboard can be securely affixed to the surface of the chassis
