3*4 matrix keypad

The white paper on the back of keypad can be peeled off, so that the keypad can be firmly pasted onto the chassis surface, very easy to install

The dupont shell on the new 3*4 matrix keypad can be directly inserted into the single-chip circuit, suitable for single-chip expansion and is conducive to study on peripheral expansion keypad of single-chip

Matrix keypad/ thin film button switch/ single-chip expansion keypad/ keypad control panel