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Keyboards

Products: 31
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Self-adhesive membrane keypad - 1 "SOS" key

Membrane keyboard has one button labeled "SOS". On its back is the tape to facilitate mounting.
5.0 (2)
Index: MOD-09914
Index: MOD-09914
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Keyboard panel 2x2 - compatible with LEDs - SparkFun COM-07836

Overlay for the keyboard with 2x2 - 4 keys. Under each button, you can mount the LED in the through hole case of 3 or 5 mm. It allows you to create panel of keys with the...
Index: SPF-02273
Index: SPF-02273
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Regular price €2.00 Price €1.90
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Membrane Switch Keypad 1 Key - red

Membrane keypad with one red key . The keyboard is equipped with a 90 mm long connection tape, the tape itself is finished with a female connector with a raster 2.54 mm...
4.9 (9)
Index: DNG-16991
Index: DNG-16991
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Regular price €1.50 Price €1.50

Panel for 4x4 keyboard - compatible with LED diodes - SparkFun COM-07835

Keyboard overlay with 4x4 - 16 keys. Under each key, an LED can be mounted in a 3 or 5 mm threaded housing. This allows you to create a backlit key panel.
Index: SPF-02272
Index: SPF-02272
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Regular price €6.90 Price €6.90

Membrane keypad - 1 green key - self-adhesive

Keyboard with single round key in green. Dimensions of the module itself are 23 x 20 mm . The keypad's outlines are made in the form of a 90 mm long tape with a 2-pin...
4.8 (5)
Index: DNG-16992
Index: DNG-16992
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Keyboard - 2x4 tact switch matrix - Waveshare 3678

The matrix consists of 8 buttons, type tact switch, distributed in four rows and two columns. The signals are displayed out on the 9 popular goldpin connectors - pitch of 2.54...
5.0 (1)
Index: WSR-04499
Index: WSR-04499
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Membrane keypad - 1 yellow key - self-adhesive

A membrane keypad with one key in yellow equipped with adhesive tape. To connect the keyboard to the main module, a tape ended with a 2-pin female connector is used, which...
4.8 (5)
Index: DNG-16989
Index: DNG-16989
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Touchpad TTP229 - 16 buttons

Module of the touch keyboard with 16 keys, it has TTP229 syste, it communicates through a digital interface. Supply voltage is from 2.4 V to 5.5 V.
5.0 (1)
Index: GRL-12499
Index: GRL-12499
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Membrane keypad - 1 grey key - self-adhesive

The keyboard is equipped with a single round key in grey . On the back there is a layer of adhesive tape. Equipped with 94 mm long tape with a 2-pin plug with a 2.54 mm...
5.0 (2)
Index: DNG-17118
Index: DNG-17118
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Membrane keypad - 2 coloured buttons - self-adhesive

Keyboard equipped with two colored buttons. Keyboard leads are made in the form of a connection tape finished with 3-pin raster 2.54 mm . Plug located at the end of the...
5.0 (3)
Index: DNG-16993
Index: DNG-16993
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ADKeyboard v3 - keyboard module with colorful buttons

Keyboard module equipped with five colorful buttons . It communicates via analog signal, which saves I/O pins of e.g. Arduino module. Device works with 5V.
Index: DFR-03560
Index: DFR-03560
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Numeric keypad, self-adhesive, 12 keys

Simple numeric keyboard with the numbers from 0 to 9 and the signs: * and #. The reverse side has a self-adhesive tape for facilitating the installation.
5.0 (5)
Index: MOD-01681
Index: MOD-01681
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Numeric self-adhesive membrane keypad - 4 keys

Simple numeric keypad with numbers: 1 to 4. Self-adhesive tape on the back for easy installation.
4.0 (2)
Index: MOD-04266
Index: MOD-04266
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DFRobot LED Keypad Shield - Shield for Arduino

Shield for Arduino with 4-digit ,8-segment display with common cathode. In addition, the board has 5 buttons. The device operates with 5 V voltage.
Index: DFR-05516
Index: DFR-05516
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Regular price €9.90 Price €9.90

Numeric keyboard - 12 keys

The keyboard has numbers from 0 to 9 and the signs: * and #. The buttons are connected into a matrix so for the detection of 12 buttons, you need only 7 pins of the...
5.0 (3)
Index: SPF-02202
Index: SPF-02202
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Membrane keypad - 4 coloured keys - self-adhesive

Furniture keyboard with 4 coloured buttons, to connect the keyboard a tape ended with a 5-pin female connector is used. Raster of the connector leads is 2.54 mm . The...
4.0 (1)
Index: DNG-16996
Index: DNG-16996
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Membrane keypad - 2 coloured buttons with arrows - self-adhesive

Diaphragm keypad with two buttons in red and yellow, additionally there are arrows on the buttons up and down . Thanks to the navigation arrows, the keyboard is perfect as...
5.0 (10)
Index: DNG-16994
Index: DNG-16994
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Membrane 4x5 keypad - 20 keys - self-adhesive

A small membrane keypad with 20 keys in a 4 x 5 layout. The keys on the keypad are numbers: from 0 to 9 , two function keys F1 and F2 , special characters: * and # ,...
4.8 (3)
Index: DNG-16997
Index: DNG-16997
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Tact Switch module 6x6

Module with button, type tact switch, size of 17 x 10mm with two holes with a diameter of 2.3 mm.
Index: MOD-02645
Index: MOD-02645
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Regular price €0.50 Price €0.50

Membrane keypad - 3 coloured buttons - self-adhesive

Equipped with 3 colour membrane keypad buttons . Simple input device allowing to control projects e.g. based on Arduino or STM32. Keyboard leads are made in the form of 90 mm...
4.5 (2)
Index: DNG-16995
Index: DNG-16995
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Membrane keypad - 1 blue key - self-adhesive

The keyboard with one key in blue has been equipped with a self-adhesive tape which allows to place the keyboard on any surface and in any place. The connectors of the...
5.0 (10)
Index: DNG-16988
Index: DNG-16988
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Self-adhesive membrane keyboard 4x4 - 16 keys

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...
4.9 (11)
Index: DNG-17119
Index: DNG-17119
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16 x tact switch keyboard

The matrix consists of 16 tact switch buttons spread out in four rows and four columns. Signals are output on 8 popular goldpin connectors - 2.54 mm raster.
4.8 (6)
Index: MOD-02895
Index: MOD-02895
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NeoTrellis RGB Driver PCB - 4x4 keyboard with backlit keys - Adafruit 3954

NeoTrellis RGB Driver PCB keyboard with 16 buttons arranged in 4 columns by 4 rows. Each button is illuminated with a separate RGB LED, so the keys can glow in different...
Index: ADA-21015
Index: ADA-21015
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Regular price €18.00 Price €18.00

How do keyboards work?

The buttons placed on a typical membrane keyboard are arranged in the form of columns and rows. For example, a 3X4 keyboard has three columns and three rows, and a 4X4 keyboard has four rows and four columns. There is a membrane button between each key. Each button in a row is connected to switches in other rows via a signal conducting path. Each button in a column is connected in the same way - unilaterally to other switches in the same column via a conductive path. There is a separate pin for transmitting control signals for each row and each column, which means that for a 4X4 keyboard, 8 pins will be needed. Pressing the key closes the circuit between the row and the column and causes control current to flow between the appropriate pins for the row and column.

Keyboards ideal for working with embedded systems

Keyboards allow the user to enter input while the program is executing a set of instructions and commands. The Botland store also offers keyboard modules compatible with Arduino, and an appropriate Keypad library has also been designed for this purpose. The keyboard is often used as an input device for Arduino, and membrane models are an affordable solution for many applications - they are thin and easy to install in many devices.

Matrix keyboards - Botland - Shop for roboticists

Our store's assortment includes various types of keyboards. Individual models are characterized by a different number, size and type of keys. We offer both self-adhesive membrane keyboards in various variants and numerical models (with markings on the keys). The most common layouts are 4x4, 3x4, 2x2 and 2x4. Matrix keyboards with 1, 2, 3 and 4 buttons are also available. Additionally, in this section you can find keyboards for Arduino and other systems. All models have clearly marked pins. In practice, this means that correct connection should not be a problem.

Matrix keyboards - FAQ

A matrix keyboard has buttons grouped into columns and rows, which allows you to control more buttons with fewer lines of data.

A matrix keyboard is composed of buttons arranged in rows and columns. Matrix keyboards include, for example , numeric keypads .

A membrane keyboard is a type of keyboard in which pressing a key brings a layer of special foil into contact with an electrical circuit printed on the layer below, which generates an electrical signal. You can learn more in our article about membrane and mechanical keyboards .

The method of connecting the keyboard to Arduino depends, among other things, on the parameters of the selected model. You can find more information about connecting various extensions to Arduino on our blog .