Diaphragm keypad equipped with 16 keys in 4 x 4 arrangement.It has numbers: from 0 to 9, letters: A, B, C, D and special characters: * i #. On the back of the keyboard there is a self-adhesive tape for easy installation. The keyboard is equipped with 8-pin tape with a 2.54 mm grid, so it can be connected to the main module, such as Arduino or STM32 using connection cables or through a goldpin strip.The keyboard can be used as a data input device.
Membrane keyboard with 16 keys.
How to connect the keyboard
The keyboard can be connected in two ways. The layout of the outputs is shown in the figure below.
| Pin Number | Description |
| ROWS | |
| 1 | PIN1 is taken out from 1st ROW |
| 2 | PIN2 is taken out from 2nd ROW |
| 3 | PIN3 is taken out from 3rd ROW |
| 4 | PIN4 is taken out from 4th ROW |
| COLUMN | |
| 5 | PIN5 is taken out from 1st COLUMN |
| 6 | PIN6 is taken out from 2nd COLUMN |
| 7 | PIN7 is taken out from 3rd COLUMN |
| 8 | PIN8 is taken out from 4th COLUMN |
The layout of the outputs and how to connect the keyboard.
Diaphragm keypad specifications
- Maximum Rating: 24 VDC, 30mA
- Number of buttons: 16
- Dimensions: 77 x 70 x 0.8 mm
- Belt length with connector: 83 mm
- Type of connector: 1 x 8 pin – female raster 2.54 (goldpin connector)
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